I can't tell you how impressed I am with these guys (in fact, I am going out of my way to write a review about them wherever I can). I took my car to the Nissan dealership because of a service engine light and some funny noises my car was making when starting it up. I was told I needed my head gasket replaced which was going to cost me $1800 at the dealership. I called around and these guys quoted me $1500 for the head gasket replacement. But when I brought my car to them, they took it upon themselves to double check the problem and they came to the conclusion that the head gasket didn't need to be replaced. So rather than simply doing the work that I asked for and billing me $1500, they advised me not to have my head gasket replaced. And they fixed the service engine light problem and engine problems for less than $200. Honest and friendly. They go the extra mile! They now have a new customer for as long as I live in the Denver metro area.