Southwest Air Conditioning and Heating did a decent job. I have used them numerous times and on the most recent visit, they came to address an issue with the heating unit. The technician took a look at the thermostat and then left, but the problem still persisted. I needed to call him a second time because there was still no heating. It took him half a day to finally find the issue and fix it. We have not had any problems since. I would have preferred if he had taken a thorough look at the unit the first time and fix it then. Other than that, I have no major complaints. I would use them again in the future.