I have used them several times for standard furnace and swamp cooler set-up, but they keep getting less and less reliable so I'm cutting them loose. At least 5 times, they have not shown up for appointments and when I call it's either they didn't have my correct phone number and so didn't come when no one answered, showed up at the wrong address (and never bothered to call), or just forgot about the appointment completely. They recently did some major work on our house and were supposed to come by the next day to collect payment and go over everything they did / test everything. They not only never showed up, but never called. It's now three days later and I still haven't heard anything from them. I'm sure when we go to do the walk-through, they will also have forgotten to do one of the repairs they said they would do. Stunning lack of professionalism and follow-through.