Complete Comfort Heating and Air were the ones who installed my furnace in May of 2017, and recently, they came out when I was having an issue with my system. There was a part in my furnace that had stopped working, so their tech came to fix it. They did their job, but I was not completely happy with them. It seems they used a dirty filter to get around my warranty, so it ended up costing me out of pocket. My previous experiences were fine, as their techs are very professional. I will keep using them as long as I have my warranty, but I will probably start searching for another company once it expires.