Mail order Tunes? Are you kidding me. If you call spending about 3 hours on the dyno getting my car tuned in mail order. LMFAO And the same could be said for the other shop, both will do good work if you are the type of person that needs a shop to do their work for you. Personally I use GHP to do all my tune work and had nothing but great service. Pretty soon I'll be buying the SCT proracer Package so I'll be the one doing most of the tune work on my own car...I haven't really heard too many good things about Gearheads. All they do is mail order tunes. And a good amount of customers from them end up going to HPP to get their work redone because it wasn't done correctly the first time. I personally have no experience with them, just going off of feedback from other peoples experiences with them.