We've had Carefree Comfort come to our house for annual routine check-ups. Overall, the technician is professional, friendly, and on time.
Unfortunately, our heater ignitor went out over New Years one month after our annual check-up. The technician was prompt and replaced the ignitor the next day. No issues since then.
However, we were hoping the annual check-ups would detect and prevent these issues from occurring, which we were told by the technician at the time of the part replacement. This way we wouldn't have to pay for another service call (especially the price for an emergency call).
In the future, we will not have annual check-ups given the difficulty of detecting potential issues with the heating system. We'd rather take our chances.
Overall, they do good work.