The technicians, Gary and Mark, called to say they were on their way. They arrived at at the scheduled time. Our installation was at Big Canoe, GA, almost an hour from their office in Woodstock, GA. They removed our existing heat pump, and installed a new dual-fuel heat pump, including new gas lines and flue vent lines. They did a very professional job. They reconnected and reprogrammed my existing Nest thermostat to work with the new system. They finished in one-long day. They cleaned up the project very well, and were very polite. It was a good experience - I would use them again.