I have been using Southwest Air Conditioning and Heating for years and I have always been more than satisfied with their services. The last time they came out they changed out my smart thermostat for me and rewired it. The service tech was super-friendly, super-polite and super-knowledgeable. He did a really good job for me. I highly recommend Southwest Air Conditioning and Heating to everyone! They are a very professional company and they have never let me down in all the years I have been using them!