We have 2 central systems: one for main part of house and second for add-on and upstairs. In June our secondary unit went out. Another company said a “band-aid” fix would be close to $4000 and we really should just replace the whole thing. We couldn’t do that financially so we bought free-standing and window units. This week our main unit stopped working. They came out and had it up and running in short order and for about $100. So we asked them to give us a second opinion on our secondary unit. He didn’t want to know what the first company diagnosed was wrong with it until he did his own inspection. His diagnosis was one of 3 things being wrong, which would have to be tried separately, but at the very MOST, the third and worst problem would cost us about $1500! Then he looked at the other company’s result and said there is no way they could determine that being the problem without checking other, simpler things first. AND their $4000 fix would be less than half that with A/C Service and Repairs Co. He got the unit up and running, (it was the second situation) for about the same cost as what it cost us to buy the free-standing and window units initially. We could have been running that air all summer instead of using these window units. We will never use another A/C company again! Oh and he called back that night to check and make sure it was still running well. THAT’S good customer service.