the sales person took the time to answer all my questions and explain exactly how my bay window would be built. when i asked for more than the required amount of insullation and strut support, he made sure to include that in my contract. the crew was very efficient and they did a good job of cleaning up afterwards. i have a large house with many windows and this is the third installation company i have used. i have five more large windows and a door that will need replacing in two or three years and i will be sure to call Centenial Windows again.