I cannot say enough good things about Andrew and O2 Assist! I'd do 20 stars if I could! I learned about Andrew and his Hyperbaric Oxygen Chamber Therapy from the fabulous Dr Sadati and all I can say is WOW! The accelerated healing I experienced from the HBOT treatment was undeniable. I had my procedure done with Dr Sadati on 3/6 and a few days later, experienced swelling (normal/expected part of the recovery process) that was making me really uncomfortable and was advised to call Andrew. He was so understanding and accommodating and got me in as soon as he could. I experienced relief after the first treatment and things just kept getting better after that. Minimal bruising and my swelling began to disappear. Tomorrow will be my final treatment with Andrew and I can say without hesitation, that should I undergo any future procedures, I would include HBOT as part of my recovery process, hands down! read more

Extremely poor customer service. Will not work with insurance providers and refuse to provide information to give to insurance providers. They do not answer phone calls and chat varies from nice to extremely rude. They are nearly impossible to reach. They will be happy to take your money but that is all. They have the BBB logo on their website but are not an accredited business. This is on the BBB website: "O2 Assist is NOT a BBB Accredited Business.To become accredited, a business must agree to BBB Standards for Trust and pass BBB's vetting process." read more

Wonderful company. Andrew gave me great service during a difficult time. I highly recommend them to everyone i know who needs oxygen.

I Strongly recommend under every circumstance to order your product through o2assist.com. They have been very professional with my grand daughter and her condition.They gave her professional advice, great service and I feel they kept her alive with there fast knowledgeable advice and professionalism. Thank you o2assist! I also recommend going to there website for support and assistance before you call them. Thank you again!! read more

If I could give less than a star I would please please please do not do business with this company. Run anywhere other than here. Nothing but excuses and run around with Andrew, over a month and a half and no machine a loaner that never worked. I understand that people are human. But communication goes a very long way when you are trying to purchase things. No accountability on the side of the business or the business operation. He claims to have a military contract as well but that needs to change if he does. I would not want this kind of customer service provided to our men who served. If you want to have money tied up and get many excuses do business with Andrew. If not go somewhere else. Also asking me to remove my google review via text message! read more

Andrew was very helpful and friendly. My father needed an oxygen concentrator quickly and from a trustworthy source, during a crucial time. I could tell that Andrew runs a considerable portion of the business himself, so being patient and and reasonable as a customer helps everyone out. We are satisfied with our purchase and will shop with O2Assist again. read more

Andrew has been very patient with me through several different units till I found the one that worked for me. He was always pleasant, patient, extremely knowledgeable, sincere, super helpful, and always had my trust doing exactly what he said he was going to do. Every return and replacement was postage paid and arrived in exactly the time assigned. After finding O2 Assist I would not go anywhere else for my equipment needs and I further recommend to anyone who has any pulmonary, lung, breathing issues and in need of any equipment to call Andrew and he will not steer you wrong and you will get exactly what you want and need everytime. read more

I would be very careful working with this business. I am in the middle of an issue where we dropped off a Eclipse 3 oxygen concentrator in excellent working condition to see if it could be resold to a person in need. They told us that the machine was not working and made a low ball offer. We did not take the offer and went to get our machine with batteries and accessories. They gave us a different, old beat up machine and said it was what we brought in. I have the serial number and model of the original machine, which they said they did not have. I requested my original machine or fair market value and have not heard anything back. I filed a complaint with the BBB in hopes of getting resolution. The person I dealt with is very smooth and talks a good game. Buyer beware of anything purchased by this company. Very bad business practices so far. I will repost if we get satisfactory resolution This is an updated review: I have not received a satisfactory resolution from Andrew Kardish or his company: O2 assist, in Lake Forest. Therefore, I must give these people a zero stars out of zero. I would not work with these people EVER, or recommend anyone else do business with this company. We hoped that they would do the right thing, but no luck. Andrew Kardish will be judged by Karma and a bigger entity than anyone on this earth. He does not have any ethics, nor does his company for allowing such a person to represent them. Life is too short to deal with dishonest people. So Sad. read more

I made the mistake of going to Andrew Kardish at O2 Assist, I wish I had read the reviews about this man and company first I would never have gone there. I purchased an oxygen concentrator from him it worked okay for the first two days then one night it quit I was getting no oxygen I wound up in ER and was hospitalized for four days then returned home with in-house oxygen from my health care provider. Unfortunately when I returned home I was on bed rest for a few days and when I contacted Kardish to return the unit he said no he would not give a refund he had a eight day return policy and it was the ninth day. I explained what had happened and he told me it was my fault because I wasn't breathing properly! Yet it worked fine for the first two days all of a sudden I forgot how to breathe, funny thing that I've been doing it for 72 Year's, didn't think I'd ever forget. He did not perform the prescribed tests in the manual before passing the unit on to me and I didn't trust the unit for future use. He said he would send a return box and label so I could return the unit for test and evaluation. He is of course a liar, the box never came, I emailed to find out what happened to it, no reply, he thinks if he stays silent I'll go away, not going to happen! I'm now contacting the manufacturer to complain about O2 Assist and to find a reputable service company. O2 Assist will take your money and run, you will get zero customer service only lies, insults or no reply's at all. You are far better off going to Amazon, I could have bought the same machine $500 cheaper with a way way better return policy and customer service. If I could give negative five stars I would! Posted without prejudice. read more