Out of the people that came to quote, the salesperson was very knowledgable, polite and easy to work with. We are pleased with the quality of workmanship and the 6 windows installed. I wouild have ranked them higher but I felt it wasn't completed as best as possible, The installers left debris around, didn't clean the windows and sills. If they had, they would have noticed that one of the windows was scratched. I called the company and they had replaced the insert, with no hassel. They also followed up with some other minor issues I had, although one small mark wasn't really fixable on the aluminum cladding - and I didn't want them to replace the whole unit. Overall, I'm please with the quality of windows supplied, but like when spending any kind of money, like on a car, you don't want to spend two hours cleaning after just getting it.