I made the appointment on a Monday and they showed up early on Friday as promised. In about 2 1/2 hours they cleaned all the air ducts and performed a furnace inspection. They were efficient, friendly and courteous. The workers cleaned up after themselves and did not leave any messes behind. My wife and I felt very comfortable with the workers in our home while they did their job. In times past, I asked another company never to return because of dirty work and attitudes.