From the first meeting with the sales rep to the final install, our experience was Great! We had a few questions after our initial meeting with sales, and he was very responsive. The installers came with masks and were very professional, they laid down drop cloths where they were going to be walking, very polite and respectful. They gave me a time frame as to when they thought they were going to be done, and they were spot on. when they were done they went through how to work windows, and cleaned everything up. The windows are fantastic, love the white. We only had 2 windows and a sliding door replaced but will be using Window Concepts for this in the near future.