I was having some problems with my truck that each mechanic I took it to thought it was something else. I talked to Doc on the phone and he seemed to have a good feel for the issue and brought up some points I hadnt thought about. I brought it in they diagnosed and then fixed my truck to better than it had ever been. I had lots of questions and they patiently listened to, then addressed each one.
They can handle anything from a basic tune to a full race build, and do it competently. I cant recommend them highly enough.