I put the cross drilled rotors and Powerstop pads on my wifes explorer. (she is hard on brakes) So far so good, I don't drive it enough to know if the braking distance was reduced or not. The side benifit that I did not expect was the reduced brake dust. With regular pads the rims would be trashed in a couple days. Now it seems the road dirt is worse than the brake dust.
I've got a set of cross drilled rotors and Powerstops pads that I have been meaning to put on for a year now.