All I can say is if you have an A/C or heating problem.... like their name, you can really trust this company! I used them for my own services. I was referred by SRP during some promotion for annual check ups of your system. On that trip I bought an electric timer thermostat, was thankful to have them recommend it & install it on the same visit. Then in the middle of a cold winter my unit gave out.... kaput, nada, nothing, DEAD! Well, I had to get a couple of estimates before going with such an expensive repair. Trustworthy came out the winner, gave me a top of the line unit for a good price in comparison. (replacing your A/C-heater unit is not cheap!!) Then my friends had a problem at the beginning of an AZ summer - yikes! I referred them to Trustworthy who was at their house w/in hours/for approx 5 hours & fixed their problem for under $300 when they thought they would be paying thousands to replace an old unit. Needless to say they were impressed & extremely thankful & instantly became new loyal referring customers like myself! They are honest, hard working & I would vouch for them any day!