Called to repair one of our HVAC units at the height of the week-long heat wave. They were able to send someone over the next day and he not only diagnosed the problem, but had the part with him and fixed it! Six days later, the unit appeared to be having the exact same problem. I called, same repairman came back the following day and discovered the part had failed! So he replaced it under warranty and I wasn’t charged for the 2nd call or the 2nd part. So all-in-all – quick, efficient, reliable and effective. This isn’t my first experience with them, but the most recent and I’ll stick with them.