When the capacitor from my air conditioning unit went out, I called up Comfort First Heating & Cooling. They came out and replaced the damaged part, and they did a very good job. So much so, that I signed up for their bi-annual service contract plan. They came back out not long afterward to service my system and made sure it was still running smoothly. They were very professional, on time, and were good at cleaning up after themselves. Even if I didn't have the service contract, I would definitely use them again.