We purchased our patio doors at our local home show where Northern Comfort Windows and Doors had a booth. We spoke with Rick the sales person on hand and received information regarding the product. When we got home shortly after and my husband and I decided that we would go ahead with the purchase. Rick had come over after the home show which we very much appreciated. After installation of the door we had one problem with the locking device and was worried that I would not get them to come back up and fix the problem. I was mistaken and the problem was resolved and the experience was very comforting and would recommend this company to anyone.