About a year ago I had Thermo Twin put a bay window in our living room and I was very pleased with the window. I recently decided to have the remaining windows downstairs replaced. I once again used Thermo Twin. Overall I am very pleased with the windows. I had one minor problem, when they were installing the windows one of my window sills got scratched. I called and complained. They came back the following week because of my schedule they were able to come before that but I was not available. I can't hold that against them. They repainted my sill and I am happy with their service. I rate them a 4 out of 5 for the scratch but I would use them again in the future. I am very happy with their windows.