I'm running the first set of RSM'* for the H bodies. I love the decreased dust, and better braking.
The slots allow water to shed for better wet braking, they also allow the pads to outgas rather than trapping a cushion between the pad and rotor. As they get hot, they bite harder.
HOWEVER, I've successfully warped my RSM'* twice now. I'm looking for an alternative. RSM'* are great for mild-lightly hot street driving, but can't hold up to my style. (Keep in mind I had instructions to TRY to destroy them).
Raybestos Ceramics are the best pads. At least in my experience. I'll keep them when I switch rotors. Don't run them on stock rotors, though.