First let me say that I LOvE my windows. They are quiet and keep the noise out and they keep the heat in. I recommended them to my parents when they got new windows and they were satisfied too. But, the salesman we dealt with was frustrating. He had quoted us with scroll out windows, not slide but what they installed while I was at work were the sliding windows which were cheaper. They were frustrating to deal with front that point on and we never got the 800 or so extra back nor did they give us the proper windows. In the end, we like our sliding windows but would have liked better customer service.