Dave did a thorough job in cleaning our ductwork (which had not been cleaned for 20 years - since the house was built). Boy, were they full of stuff! All went well until the final cleaning area of the furnace - then things went very poorly. He accidentally cut too low into our plenum, and put slices into our air conditioning coil. After contacting the home office, he let me know what he had done, and told me about contacting the office, and their offer to repair the damage. Since it was the start of winter, the repair to the A/C would have to be done next spring. Fast forward to May of 2016, and I still had not heard from them. I contacted them, and they sent out a HVAC company to estimate the amount to repair the damage. The repair technician told Guarantee System (GS) that the system could not be repaired (it was an older model with R-22 Freon), and would have to be replaced (not entirely true - you'll see why later), and it would cost approximately $5,000 to replace the system. After hearing nothing back from GS for several weeks, I contacted them again to find out where things stood on repairs. They told me of the estimate (which I thought was very high), and then sent out another employee to determine if a replacement coil could be found. After another week (toward the end of May), I again had to call them to find out the status of the repairs. I was told by them that they could not find an "exact" replacement coil, and they didn't know what to do. I looked on line, and found a coil that would work, and told them I would settle for a check for an "estimated" repair of the system (replacement of the coil, R-22 freon, labor charges) and replace the complete system (since the furnace was 21 years old). The owner of GS really drug his/her feet to approve a settlement for me! It is now June 22, 2016 (and we have had several hot spells), and we have just now settled on an amount (not exactly the amount I was hoping for, but I am really tired of screwing around with this), and am awaiting the check from them to replace the system. GS only offered the minimum amount for the repair, and offered no other goodwill offering for waiting so long for this repair. After I have the new system installed, I will review the company I have perform the work.