I’ve used Cooper for the last three years. They installed my new furnace and air conditioner which I purchased through Costco. I have them inspect my new equipment twice a year, once in the fall for the furnace, and once in the spring for the air conditioner. Each inspection has been performed by a different technician, an each one has been very professional and thorough in their work. The service always includes a thorough report with pictures of everything they checked and inspected. I am very impressed with the quality of there service..