They did a awesome job installing my windows and doors. In fact, the first day we saw a BIG difference in our heat. It was coming on all the time. Now it comes on 3/4 of the times as it did before. We can not wait to see the bill for gas. We will be putting the extra money into other things. My wife said this summer is going to be awesome and can not wait to see and feel it. PLEASE USE THEM FOR YOUR WINDOWS AND DOORS. YOU WILL LOVE IT.