Everyone drives differant, so its hard to gauge how a clutch will hold up, doesnt matter which brand
I have a extreme, the heavy duty one, and mine has been on there now for almost 3 1/2 years, done 62,000kms and still grips like all hell, I would definatley get one of these again.
Mine is also running with a cromoly 4.5kg flywheel, installed the same time. All those kms where done making around 200rwkw too
Dunno what you guys are worried about, just put it in and enjoy!