5 Stars! Highly Recommend XO Window Systems We recently had XO Window Systems replace the windows in our home in Irvine, and we couldn't be happier with the results. From start to finish, their team was professional, thorough, and incredibly helpful. What really stood out was how clean they kept the work area during the entire installation process. They took extra care to protect our home, and it was evident that they take pride in their work. The follow-up after installation was fantastic as well. They didn't just leave once the job was done--they made sure everything was functioning properly and even educated us on the different types of windows we should consider for our space. We were initially overwhelmed with the idea of choosing the right outdoor windows, but XO Window Systems took the time to walk us through all our options, making the process much less stressful. Living in an HOA community, we were concerned about the complexity of permits and HOA rules. XO Window Systems was extremely knowledgeable about the regulations in our area and helped guide us through the necessary steps to ensure everything was up to code. Overall, the entire experience exceeded our expectations. We felt supported every step of the way and are thrilled with the final results. I highly recommend XO Window Systems for anyone looking to replace or upgrade their windows! read more

If you are looking for an honest, highly skilled window replacement company, look no further!! We recently hired Amir and his crew, and the entire experience was completely stress-free. We had talked to three other vendors prior, and none of them were able to match the specific sunburst grid pattern we wanted to keep. Amir not only assured us they could do it, but the final result looks perfect. He provided straightforward communication, a very reasonable price, and a smooth measurement appointment. I also highly respected that he strictly follows California law by only taking a 10% deposit upfront, which gave us a lot of peace of mind. The installation day went perfectly. The crew arrived right before 9 AM and managed to tackle all 9 windows, including our sliding door, in just one full day. It happened to be an unusually hot day in February, but the guys worked tirelessly, professionally, and were so nice to have around. The finishes are beautifully done. They even went above and beyond when we asked if they could caulk some gaps around our front door. it wasn't part of the scope, but the crew took it in stride and sealed everything flawlessly. My wife and my parents couldn't be happier with the new windows. I wholeheartedly recommend Amir and his team to anyone needing reliable, top-tier window services! read more

XO Window Systems is an outstanding company, and I highly recommend them. I recently hired XO Window Systems to replace two windows in my home, and the entire experience was excellent from start to finish. They responded quickly to my Yelp inquiry and promptly scheduled a sales consultant to come out and provide an estimate. Throughout the process, the team was transparent about pricing, timelines, and installation details. They took the time to explain everything clearly and never used any high-pressure sales tactics. What impressed me even more was their honesty regarding another window issue I was having. Even though it wasn't a window they had installed, they informed me that it was still under the manufacturer's warranty and that the manufacturer should cover the replacement rather than trying to sell me something I didn't need. On installation day, the technician arrived on time, worked efficiently, and did a fantastic job. He was professional, completed the work quickly, and left the area spotless when he was finished. The entire process was smooth, communication was excellent, and the customer service exceeded my expectations. If you're looking for a trustworthy, knowledgeable, and professional window company, I would definitely recommend XO Window Systems. read more

I recently had the pleasure of working with XO Window Systems, and I couldn't be happier with the entire experience. From my first conversation with Amir, the company owner, I could tell I was dealing with someone who truly cares about his customers. Amir took the time to explain all my options clearly, helped me choose the best windows for my home, and made sure I understood every step of the process. His professionalism, honesty, and attention to detail really stood out. When it came time for installation, Salvador did an absolutely outstanding job. He arrived on time, worked efficiently, and handled everything with great care. You could tell he takes pride in his work -- the installation was clean, precise, and done right the first time. He also made sure to clean up after finishing, leaving everything spotless. The new windows look beautiful and have already made a huge difference in both comfort and appearance. It's rare to find a company that delivers such excellent quality and service from start to finish, but XO Window Systems truly did. I highly recommend XO Window Systems, Amir, and Salvador to anyone looking for top-quality windows and professional installation. They went above and beyond, and I'll definitely be calling them again for future projects. read more

We recently had our windows installed by XO Window Systems, and the entire experience was outstanding from start to finish. The installation crew was professional, courteous, and respectful throughout the entire project. They took great care to cover and protect our floors and carpet, which was something we really appreciated. They were also very mindful of noise levels and considerate of our neighbors while working. The crew kept the work area clean each day and treated our home with the same care they would their own. A special thank you to Amir, who was absolutely fantastic throughout the process. He was knowledgeable, responsive, and genuinely cared about making sure everything was done right. His attention to detail and commitment to customer satisfaction made the experience even better. The windows look amazing, and the quality of the installation exceeded our expectations. It's refreshing to work with a company that truly takes pride in both their craftsmanship and customer service. We couldn't be happier with the results and would highly recommend XO Window Systems, and especially Amir, to anyone looking for new windows. read more

Exceptional Service & Quality - Highly Recommend! We recently replaced all the windows in our home with XO Window Systems, and the experience exceeded our expectations! From start to finish, their team was professional, communicative, and committed to delivering top-quality products and service. The entire process was seamless--our questions were answered promptly, and the team provided expert guidance on the best options for our home. They were punctual, organized, and kept us informed at every step. The installation crew was outstanding--skilled, efficient, and incredibly detail-oriented. They treated our home with care, ensuring a flawless installation, and left everything spotless when they were done. The new windows not only look fantastic but have also made a noticeable difference in our home's comfort and energy efficiency. If you're looking for high-quality windows and a team that truly delivers, we highly recommend XO Window Systems without hesitation! A five-star experience all around! read more

We recently had XO Window Systems out to our home, and I can honestly say the experience was such a breath of fresh air. From the start, their sales team was respectful, informative, and not pushy at all--something that really stood out after dealing with other companies who came across as flashy at first, but then sent in high-pressure salespeople that made both my husband and me feel uncomfortable. XO's team was the complete opposite--professional, patient, and focused on helping us find what was best for our home without any of the pressure tactics. And when it came to installation, the crew was incredibly clean, organized, and respectful of our space. They treated our home with care and left everything spotless. It's rare to find a company that combines quality work with such a calm and trustworthy approach. We're genuinely happy we chose XO Window Systems! read more

I want to take a moment to express my gratitude for the outstanding service I received from XO Windows. From the very first contact with Amir, who provided a fair and competitive quote, to the smooth scheduling of installation, everything was seamless. The install team, Sal and Erick, were truly impressive. They arrived on time and their attention to detail was evident in the beautiful installation of my new windows. They conducted themselves with professionalism, maintaining a clean work space, and it was evident that they enjoy being apart of the XO's team, which speaks volumes about the company. I can't say enough how thrilled I am with my new windows. They are simply amazing! I find myself wanting to sit outside just to admire them. I will definitely recommend XO Windows to anyone looking for high quality windows at an affordable price. read more

Amir and XO Window was a referral to us. We live in North San Diego County. He came to our home, looked over all the windows and doors we wanted replaced, and gave us a very competitive quote to replace everything. He spent time with us to consider what windows and doors would work best for our home. We ended up replacing 22 windows, 2 sliding glass doors and one French door. We are so pleased with the finished product. The lead time for window and door delivery was reasonable, not very long. The installers were very cordial and respectful to us as the home owners. They were skilled, efficient, and fast with the installation. The whole job was completed in two days. I expect we will do the other 12 windows in the future. Amir and his company are great and I can recommend them with total confidence. You won't be disappointed! read more

We had XO come out to replace the windows in our home, and the entire experience was outstanding from start to finish. Amir led the project, and let me just say--this man knows his craft. With years in the industry under his belt, he walked us through every detail with total confidence and clarity. No hard sells, no pressure--just honesty and deep knowledge. What really stood out was how Amir approached our house like it was his own. As a family man himself, he gets what it means to build a home--not just a structure, but a safe, beautiful space you actually want to live in. The windows look incredible, the install was fast and clean, and the team was respectful every step of the way. If you're considering new windows, XO is the way to go. And if you can, ask for Amir--you'll be in the best hands. read more

The XO Window Systems team did a fantastic job on windows replacement in my townhouse in San Pedro in June of 2025. They installed high-quality, energy-efficient Simonton windows throughout my home in just half a day. The installation was flawless. The windows are perfectly level, and they open and close smoothly. The trim is neatly finished, and there are no gaps or leaks around the frames. The final results are very satisfying and I am excited about the reduction in noise level and cost of heating/AC. The installation crew was punctual, polite, and respectful of the property. They communicated clearly about the progress of the work and addressed any questions promptly. I would highly recommend Amir and XO Window Systems to anyone in need of reliable and trustworthy window installation. read more

After looking at multiple companies to replace all 23 of our home windows we decided to work with XO Window Systems; and it was the best decision we could have made. Amir not only gave us an amazing presentation, but gave us the details we needed to fully understand the product, service, and installation process. We considered a few companies and found a better quote, but Amir stayed in communication with us and matched it. So the decision was a no brainer. A job we thought would take 2-3 days, ended up taking just 1 day! His install team are all professionals who worked fast, and provided top quality installation. They were efficient, cleaned up after themselves and made sure everything was installed as planned before they left. Highly highly recommend. read more

I recently had some of my windows and doors replaced by XO Window Systems and couldn't be happier. From the start, Amir was professional, knowledgeable, and responsive--he walked me through all my options and helped me choose the best fit for my home. The installation was smooth and efficient, and the craftsmanship is excellent. The new windows and doors look amazing, and we're so glad we made the decision to go with XO. One screen arrived damaged, and Amir immediately ordered a replacement under warranty and personally delivered it as soon as it arrived--great customer service! Pricing was also transparent and fair, with no surprises. Overall, a stress-free and rewarding experience. Highly recommend XO Window Systems! read more

I replaced 11 windows and a slider in my home. After speaking to 4 window vendors, XO Windows had slightly better prices. Most of all, Amir took time to explain how windows are manufactured, and how their installation (and warranty) sets them apart. He welcomed questions, which I appreciated. On installation day his professional crew installed the entire order in a little more than 8 hours. They were very professional and conscientious. When they left, they cleaned up all areas. Other than having new windows, you would not have guessed that a home reno project had just been completed. read more

Everything went well. Amir was very personable from the beginning. After the salesperson left we still had some questions, especially from my son. He ultimately made the choice to go with XO Windows They were punctual when measuring windows and the package Amir helped me give the HOA was impressive. We were approved quickly. After the final measurements the windows and sliding door arrived in a very timely matter. Fernando and Ray did an exceptional job with installation even reinstalling the blinds (which was not a part of the work order). We are very happy with XO. read more

XO Window System exceeded our expectations from start to finish! Amir got us a fantastic deal on replacing our old windows and sliding door, and the final results look amazing. The team was incredibly friendly, professional, and easy to work with throughout the entire process. I really appreciated how smooth everything went -- no stress, just quality work. On top of that, they offer a great warranty, which gives me extra peace of mind. Highly recommend them if you're looking for top-notch window and sliding door replacements! read more

I had an excellent experience with XO Windows System in Orange County. Their team was punctual, professional, and communicated every step of the way, which is a huge relief compared to other installers I've worked with. They ensured the area was protected and left the space spotless after installation. The quality of the windows has transformed my home, improving both its aesthetic and energy efficiency. If you're looking for reliable, top-notch service, I highly recommend XO Windows System for your window installation needs. read more

I've known Amir for many years and can confidently speak to his professionalism, experience, and integrity. He's been in the window installation business a long time and has built a strong reputation for doing honest, high-quality work. Amir is the kind of person who takes pride in his craft and genuinely cares about his customers. He's reliable, detail-oriented, and always conducts himself with respect and fairness. If you're looking for someone you can trust to get the job done right, Amir is an excellent choice. read more

I worked in Amir's house today as window cleaner. Windows in his home his own product. The screens very sturdy, well shaped and heavy - easy to take out and to put back. It's often a problem with screens that screen guys make them to big for frame and it's very difficult to take them out and put back without a damage. As well his screens made of metal without plastic details, so over the years with careful handling they will still be same quality. read more