Though there are bad reviews, my wife and I had a great experience. We took her Kia Rio there for inspection from the groupon. First time we took it they wouldn't inspect it because the registration was expired. This is their job! And it's illegal to pass so I was OK with this.
When we finally came prepared, we dropped it off in the morning. We ended up calling around noon because we thought it would be done. To our surprise it wasn't BUT this wasn't their fault. There were other cars there before us and they take them as the order they come in. So again, our fault and error and nothing to blame on them.
We have another groupon for my car and I look forward to giving another good review. They were all very nice and professional. I would recommend this little shop in Bethel Park.