I was very impressed from the salesman who came out to get details of what was needed to the excellent installers who put the windows in. The product is top rate. I lowered my inside temp by at least 5 degrees and the house is the quietest it's ever been. The response I got when I called and said I had broken a window and could they fix it for me. Not only did I get fast repair service but they honored their warranty by not charging me for the repair. It's rare to find such an honest and honorable company these days.