Donald P. Dick Air Conditioning came out and put new AC unit on our home. They did it quickly. They talked to us about efficient units and answered all questions we needed answered. This was our first time working with them. The machine is very quiet and very efficient. We are quite happy with it. They were comparable to others in price. I don't remember there being drastic differences, but we don't really live in an area where that is the case. We chose them. Their sales manager came out first to talk to us about it. He was really good as well as installers. They were friendly. I would use their service again.