I can't say enough good things about Performance. We knew from the initial demo that the windows would be amazing. Easy to clean, can be opened on either side, so energy-efficient that I have to give our insurance company a call to see if we get a discount. But today was the install. Ramón and José clearly had this down to a science. The old windows came out with very little effort, and I got to see everything else get done in stages, as drying times and cleanup efforts were taken into account. If I had to choose one word to describe the process, it's *precision*. As an added bonus, these guys were also on time, polite, professional, and cleaned up thoroughly. The warranty on these windows is incredible too, and at one point during the install, their operations manager came by to check up on things, and told us that he is our point of contact if we ever need to invoke the warranty. What company sends a warranty call directly to the operations manager? Performance Windows, I guess. read more