Southwest Air Conditioning and Heating installed my system about 30 years ago and I have never used anybody but them since. They are always prompt to come out when I call them and no matter how hard the job is, they never blink - they just get the job done! Most recently, my air conditioner stopped working. It was hot and miserable and just plain awful. It was a Friday night. They came right out and got up on the roof and they figured out what the problem was and they got it working again. They had to rewire a switch around the drain pipe over to the pan. I am so glad that they came out that quickly and that they were able to solve the issue for me. I highly recommend them to everyone! They are the best!