Overall, I am quite pleased with TOMTEK HVAC, Inc. I would recommend the company to other people and I would use them again if I needed to. I have been using this company for about two years and most recently, they replaced the motherboard on the geothermal unit. The staff has been very professional and easy to work with. In terms of the operating procedure, I think that they could look more closely into the geothermal functions of the unit to make sure that it is programmed properly to begin with.