Not calipers but we've had their cross-drilled rotors on our GMC now for about the last 60K miles. Thru one brake job and turning, so far no problems.
I have used their rotors and pads in the past (on all my daily drivers) and I've not had any problems. Didn't know they made calipers but I would look at pad area to see how much of the pads are covered by the caliper. You might find that there is more surface area (braking potential?) on the single piston stock caliper. Idk... I'd do some more research before buying... Although they look cool as hell so idk. I'd probably buy if I had known about them.