I've had Clean Air Heating and Air Conditioning about three times for their maintenance work, and basically, it has all been good. They do great work, and they're very pleasant every time they're here. My only comment to them is that, despite being told it would be necessary for me in the future, I have yet to get a quote for a new system. I even called them up, but never received a return call concerning the quote they bring up to me. Still, when the techs are here they do great work, so I would use them again.