I had heard and read good reviews about this shop, so when my car wasn't running right along with the check engine light suddenly appearing, I decided to bring it to them, especially since they were conveniently located near my house. After a few hours, they called me back saying that my car was pretty much a goner. After the diagnostic tests they had run, they said my engine failed the compression test and that the engine was shot. They said that they could continue to run some tests on the car, but that would cost me some additional money. However, their overall diagnosis was that the engine needed to be replaced and since it was such a labor intensive job, they would not interested in replacing it for me...since the car was 16 years old, they said it would be in my best interest to just junk it or sell it for parts. So, I picked my car up and drove it home. A few days later, I spoke with a mechanic friend that lives out of town that said the story didn't seem right...if my cylinders failed compression, why would I be able to drive it at all? My friend urged me to go get a second opinion before I started the process of shopping for a new car and putting this one up for sale. Few days later I took my car to another mechanic for diagnosis. After looking at it, he said I only needed a TUNE UP. He said my spark plugs were shot (oddly enough, Northside said they tested within spec). When I told the second mechanic that I was told the engine was shot, he laughed...said compression was fine and nothing besides basic tune-up was wrong. Long story short, my car has been driving like a champ ever since the tune up (been over a month now) and I am SO glad I got a second opinion. The guys at Northside seemed very nice, but I can't believe their diagnosis was SO off. I'm really confused too, because they could have easily have completed a tune up for me and had my business for that repair. These guys almost cost me thousands of dollars; thank god for a second opinion. I'm glad other people have had good luck with them, but I will never go back based on my experience.