Marvin Windows and Doors

We used Marvin to install our windows and doors when we did a major renovation approximately ten years ago. We chose them, despite their high price because their products are exceptionally attractive. MY ADVICE IS DON'T USE THEM. The windows gave us trouble from the first year. Although Marvin did send technicians to adjust the windows, we eventually gave up because they continued to be difficult to open and close (impossible for my wife) and now the seals have gone. We're now having to replace all the windows after just 10 or so years and after spending $100 000 with them.