I haven't used them but intend to. Have had a long talk with Mike Stegman, their dyno guy, and I have confidence he knows what he's doing. They will also be doing my break in on the dyno. My build will be finished today and I am calling them this am for an appointment.
They are reccomended by baisley and they do have their own race team so they should have a clue.
Oh yeah, be sure mike stegman does your tune personnaly, I've heard the other guys can be hit and miss...