I put slotted (the ones with dimples also) RDAs onto my car, against advice (and also against my own opinion, but I thought I'd try them anyway). I'm not sure I'm convinced by the pedal feel. Probably wouldn't do it again.
FWIW though, I don't think that slots are guaranteed to make rotors crack more/worse. Not like drilled holes do, anyway. They might increase the chances of cracks on discs that get the shit kicked out of them, but not on a streeter.