I had to replace the siding and roof on my house due to a leak caused by damage not corrected by previous owner. When I had the siding contractor come back to finalize the sale, I asked about new windows in the back room. He measured and we agreed on a price. The new windows are just a wonderful, eye catching addition to the new siding. Both compliment each other and their operation is flawless and keeps the exterior at bay due to their design. If I needed windows in the rest of the house, they'd be replaced with NT windows!