I have used Air Serve for over 5 years and have always had an extremely positive experience. What makes Air Serve standout from other AC/Heating companies is that they never try to upsell you for a new unit or component parts. Other companies always seem to send a sales type along with the service technician to convince you that you need something (which never seems to be under warranty-which is not true. Air Serve will make recommendation s about enhancements that have come out but never pushes them on you. I have recommended Air Serve to a number of friends and they, too, have always been satisfied. have