I had a total of 18 windows and 1 patio door installed in my house 3 years ago by Centennial Windows. The windows were no the least expensive windows that we had quoted, but they were the highest rated for quality by CSA. The installers were very professional and did an outstanding job. The windows are solid, no drafts, and do an excellent job of keeping the house warm in the winter and cool in the summer. I have noticed a significant drop in my utility costs since they were installed.