I used to be an ASE certified mechanic so my vehicles rarely see a shop. However, when my daughter's car developed a misfire, and I replaced the plugs and coil pack to no avail, I had to take it to someone to check for a blown head gasket or other reason for the misfire. They checked for the blown gasket but after a couple tests, concluded that wasn't the problem. They diagnosed it down to a spark plug.When they replaced the plug I put in, the misfire went away. Evidently, this engine is very sensitive to the plug that's installed. I put in a better plug than what was recommended, but the vehicle didn't like it. Mike was a pleasure to work with. He didn't try to sell me things that I didn't need. I replaced all the plugs with the recommended plug and so far, no more misfire. After spending a lot of time diagnosing, I felt the price they charged was very reasonable. I highly recommend this shop and if I need a shop in the future, this will be my first choice!