I used to use Smog Pros for my service on my Honda until I had something shady occur. My transmission was giving me problems so I took it in and they said I needed a new transmission. I trusted them so I went ahead and did it. It worked great, but then my friend took his car in, and they told him that he needed a new transmission as well. He decided to get a second opinion, and the other place he went to said he definitely didn't need it, and that they were probably trying to rip him off. The part he needed was only $50. I'll never know if they pulled the same thing on me, but I think that they did. Don't trust this place at all...they have cheap service, but something fishy is definitely going on over there.