David was great, he stayed with me, ensured me that even if we hung up, that the call would continue as I went through the intermediate steps of diagnosing the problem. He saved me from a costly trip to the repair shop, and for that I am grateful. He was professional and courteous, and respectful of my needs. I would recommend David to anyone with a car issue that they might be able to diagnose themselves, before making a costly trip to the repair shop.