We had Window World install windows with argon gas for our entire home. We have had problems with the windows since they were installed. First, the argon gas does not appear to be working. The window glass is freezing cold in the winter and hot in the summer. Second, the windows were not installed well. The windows were placed into the window holes in the walls around our house and then caulked into place. A few of the windows were not made to the correct size for the holes so spacers were used. The spacers look terrible and this is not what... read full review »