I am a consulting engineer in the building design field, and am used to working with contractors. I also know how to do my homework on systems and contractors. I was impressed with Bob Cunningham when he came to give me a quote on a replacement system. He listened to my questions and answered them well. Both me and my wife were very happy with the guys who came out to do the work. They were professional, conscientious, and friendly. They installation looks great and the system is working great.