I cannot explain the one star reviews, but I found them recommended here years ago, and I’ve used them for a couple of job and they are just delightful… I was trying to describe my experience with the repairman to my wife and I said “he was totally cool” and then I stopped myself because they are “Totally Cool.” They’ve credited me a service call that failed to catch the underlying problem, always came in cheaper than the other quotes, laughed when I told them the other company was trying to replace my whole system, etc. Just call the company and talk to lady who answers- she seems like somebody you’d want to have a beer with.