It's been okay.
American Comfort Heating & Cooling installed the system in my new home earlier this year. The first time I called them, they came out promptly but didn't fix the problem. I had to call them to come back. They came back this week but it's too early to tell if they fixed the problem this time. We'll see. In the meantime, I recommend American Comfort Heating & Cooling. They are very responsive to my calls.