I was more than surprised with their excellence. They were here every day checking on things, if there was a problem, it was taken care of. We had so little to do. Cal Comfort Windows are professional, on time, careful, and friendly. Our windows expanded our home, it brought the opportunity to have more people over for parties. I was surprised this winter, it kept the heat in the house, now in the summer it’s keeping the cool air in the house as well. It has been an economic plus for us.