Greg Banish runs the place, he's had several iterations of turbo setups on his Teal 93LX mustang, starting w/ the old incon setup, and then a few different variations of a single setup. They've got some turbo experience, and I have heard some good things about the place, including talking to Banish a few times, but I've also heard some mixed feelings about them too . . .
On the plus side, they do have a Mustang dyno rather than a dynojet, its a true load bearing dyno, so it is a bit more realistic for turbo tuning than an inertia dyno.
