We are extremely happy with all aspects of the windows and customer service we received from Lifetime Windows. They provided the best windows and best service of any of the companies we received quotes from. The customer service from Sid was professional and friendly. The windows, manufactured by Dayside Windows, are of excellent quality and exceed the standards required to receive the green energy gov't rebate. Lifetime Windows used the best in the business installer- Jerry. The installation is as important as the windows- and we were very happy with Jerry who took great care to ensure the highest quality installation. We had a complete brick to brick window and frame replacement vs retrofit in the old frame so that all the foaming and sealing around the windows would ensure the best air sealing. We saw that Jerry did a good job of filling all the spaces around the window with the foam. The interior finishing of the trims and exterior finishing of the caulking was impeccable. We are very very happy with the whole experience and absolutely love our windows.