From day one Halton Hills Windows was an excellent company to deal with, they were professional, installation was quick and the windows were properly installed. I know this because I had an energy audit before and after and there was a large decrease in air infiltration (they also cleaned up very well after, a fellow even came back after the snow thawed to be even more thorough. Over all I was more than satisfied with Halton Hills windows and would recommend them to anyone looking for affordable efficient window upgrade for your home.