Has anyone had experience with this particular clutch or Spec clutches. I have read alot of mixed reviews.

The reason i am looking at this clutch is for my DD which i have upgraded and looking at around 500whp. Still want to stick to a single and the SPEC stage 3+ is rated at 470 torque and is still full face and sprung so i figure this would be pretty much perfect for my application but the amount of mixed reviews on Spec clutches and hondas concerns me.