I guess I really have no idea if they did a good job or not - its an oil change and I wouldn't know the difference. I just have to trust you. But the service was excellent. Also, they said I needed new wiper blades - my blades are 1 month old. So makes me suspicious about "add ons" ? I mentioned it to somebody else here and they thought that maybe the same thing had happened to them. I guess, once again, I'm just going to trust you and take your word on it. Just thought you should know .... But I'll definitely get my oil changed again as long as things seem ok I'll have to keep asking around about other people's experiences. But like I said, the service was great and the convenience was unbeatable.