We found this company and a couple of others through Homestars. After contacting everyone and having a few in to see our house and finalize their quote, we selected Pro-Tech. They have a very nice product (we did see marginally better, but for over $1000 more) and a very reasonable price, but it was really the service that made the experience so great.
Flavio was very helpful, responded to inquiries with lightning speed, and above all - honest. Unlike other companies, his original quote via e-mail didn't change after visiting our home. At the time, he promised us that his installer, Serge, was fantastic. We can honestly say that he actually _undersold_ what a consummate professional and perfectionist Serge is. We have a 120 year-old home with some not particularly perfect straight window frames. Serge calmly and with the patience of a saint, made every window look fantastic.
We highly recommend Pro-Tech and thank Flavio and Serge for the great work.