I gratefully thank Dave H. For the service and with the help of his top technician's were able to advice wheather to repair a "check engine" light condition or continue to drive the car. Dave explained the "what if" scenarios. Since I'm buying a new car in 2 months it was decided to continue driving it!! The options were fully explained, where else do you get that kind of knowledge. I only paid for the diagnosis and $$$'s of information. Purrfect, in my opinion, is the BEST!!!