It was obvious that the salesman Philip was very knowledgable of his product but also an experienced installer that differentiated him from other companies we interviewed. The installment process was a breeze with Junior and his crew.. We didn't need to do anything to prep or clean up afterward. The crew took care of everything and cleaned the windows as well. While it's premature to comment on the performance of the windows (1 week) , if they perform as well as the purchase and installation process I'll be very happy.