Bad. They (2 technicians) came on a Wednesday. I told them I had a similar problem a few years ago, and it was fixed by adding coolant. After spending a relatively short time, that came and told me that it was a problem with a TXV valve These control the volume of compressed coolant being released into the evaporative coils. They said it would take quite a job to replace it, as the whole system would have to be drain and refilled. They suggested I consider a new unit to replace the old existing (R22) unit. They were to check to see if they could find a replacement TXV valve, and get back the next day with a quote. Also, a sales person would come by and develop a quote for the new unit. I was told the next day that no replacement could be found, so only option was to scrap the existing unit. The sales person came the next day, and I was to get a quote on Friday, when he called, and gave me a quote for $4800. What they did not know is that I had another HVAC tech coming Friday. He came, and said his initial guess was simply adding coolant as I had suggested earlier, and that it is very difficult to identify TXV problems, as it could not be directly tested as installed. I went under the house with him to the unit, and he noted the evaporative panel (where the TXV valve would be) had not been opened, as one screw had to be drilled out to get at it. On opening, as he expected, there was NO TXV valve - only a manual valve as shown in the unit manual, which the other HVAC tech had been not interested in looking at. He fixed it by adding 2 #'s of R22. He said it would take a lot of work to find the leak, so suggested they should look at it occasionally to see that it doesn't get much worse. I contacted Comfort, and besides the quick wrong determination, they had not done any other work covered by the $95 fee below, which was then refunded. I am writing this so anyone going forward who gets a quote for replacing rather that repairing their unit not just get a quote from other HVAC's for that - but to GET ANOTHER TESTING OF THE UNIT FROM ANOTHER HVAC ALSO ! Reading the earlier reviews made me wonder about the several $ replacements that were done, not just because mine was done wrong - but how superficial the way things were done. Also, I was told that Rheeme no longer had parts to support the unit TXV, while they should have been told that there was no such part used in that unit.