Steve and Eric arrived on schedule, and even brought a portable heater because the day was quite cold. We chose to leave them in charge of the house while we went to our daughter's house in Lebanon. We stayed in contact via cell phones until they were near completion at which time I returned in time to undergo operation instructions, etc and pay the bill. Ouch. While it seemed like quite a lot of money, we bought the top of the line and expect service to justify the investment. The men were polite and friendly, and also very efficient in completing that amount of work in a relatively short time. We are quite pleased with the way the unit is performing. Also quite pleased with the entire experience.