I have very good luck with this company. We originally had them via AHS. What I like is there is very little turn over with the crew and I can request a tech by name, to do our summer/fall service. I have to say we have had NO bait and switch and they have managed to keep out system going-and it's definitely a builder grade unit. They are headed out this week to do our gas fireplace--so obviously I trust them with other things. I think they are a great company!