I have used Paul Revere Revolutionary Service for many, many years and I have never had any problem with any of their work. Their service techs are very personable young men and they know what they are doing. I have a service contract with them to maintain my heating and air system and the last time they came out, they recharged the refrigerant in the system for me. I highly recommend the company to everyone and I will keep on using them myself. They are a good company!