Our relationship with Opie's One Hour Heating and Air started six years ago when our furnace went out in the middle of December. We had called Opie's at that time, and they came out and installed a new system with a new thermostat. The thermostat had a lifetime guarantee, but it went to $@!#%, and they came out that day to replace it. In fact, they arrived within an hour. Unfortunately for us, the company that had guaranteed the thermostat was out of business, so we did have to pay for a new thermostat. That was okay. We're very happy with Opie's One Hour Heating and Air. We've always had good luck with them, and we'll continue to use them in the future.