I went to there because they posted an ad for a free AC check. My AC was working fine. The only thing was that I could hear a little noise (for less than 30 secs) when it first started. Once the engine ran well, no noice was deteched any more. The guy said he would give it a test. He adjusted the temp to 62F and pushed on the gas to the end, and for almost two minutes. I heard the engine roaring, and my full size SUV shaking. Then, I smelled something burning from the SUV hood. And then the AC stopped completely! It worked fine when I drove there. That guy broke the AC compressor (later I found from the GM dealer). That guy wanted me to pay the inspection fee, because he said mine was a full SUV! and was not free! I ended up paying $1800 replacing the AC to the GM dealer. My colleague told me later when I told him the story, never go to this guy, he is a snake, and cheating all the time. He had a bad experience with this guy. If you saw this post, you are lucky. Trust me. If so many hated this guy, you better avoid it.