I was referred to Approved Comfort by a friend of mine and I called to get an estimate. The sales man gave me may different options without being pushy. I thought about it and made up my mind to go with Approved Comfort. A Couple of weeks later my new unit was installed, the installers explained to me how to replace my filter and how to work my new thermostat. A few weeks later Approved Comfort sent a technician to do a Quality Control on my new unit and noticed that a switch was in the wrong position, they changed it to the correct one, cycled my system and made sure that my unit was working properly, very nice people at Approved Comfort!