i have an stm 48-tooth, non-slipper. it works well enough. not noticebly better or worse in terms of feel than a standard 12-tooth setup. the 48-tooth is supposed to prolong clutch life, though i haven't reached the end of my clutch's life to confirm that claim. the other real difference is that the 48-tooth doesn't rattle as loudly when you pull in the clutch. depending on you, that may be better or worse. also, just be aware that if you are in quick need of a clutch plate (for example, if you're at the track), it's a lot easier to find a standard 12 tooth one than a 48 tooth one.