Craig at DSM Heating and Cooling went out of his way to work around my busy work schedule to come to our home and give a price quote on new central ac and furnace. He was obviously highly experienced and knowledgeable in all aspects of air conditioners and furnaces and took the time to explain so I would understand. The install crew was outstanding and thorough. Though they spent the most part of the day in the basement installing the furnace, ac, and new vent, their work did not impose on our daily lives upstairs. They were very professional and friendly and cleaned up their work mess when they were finished. Final cost was exactly what was quoted. No hidden or unexpected charges. It took the city inspector only a couple minutes to approve their work-which shows he knows these guys are good at what they do. I highly recommend Des Moines Heating and Cooling. They know how to treat their customers to keep them as customers.