I thought Comfort First Heating & Cooling's service was impeccable. The people were polite and seemed to know what they were doing. I first heard about them through American Home Shield who highly recommended their service. The techs showed up when they said they would and they were able to complete the job in the timeframe they had given me. My Air Conditioner is now up and running to my satisfaction, I would definitely use Comfort First Heating & Cooling again.