We have a home warranty plan through American Home Shield, and through them we've had Comfort First Heating & Cooling come out at least 3 times. They're consistently very friendly and pretty fast, also efficient in coming out, diagnosing the problem and getting parts in a timely manner.They usually respond either the same day or within 24 hours. Last time we were having an issue we just had them come out to check to see if the heat was blowing correctly, they made some adjustments and were out in 30 minutes, and it's been working fine since. They've provided great service, I'm very satisfied.