As it is a clutch it is difficult to say if it will be long lasting. The diaphragm spring is a bit stiffer compared to the original one but needed when you've got increased torque and hp on this bike. The original clutch can't handle much more then the oe specs, it was good for 8k mls. I think it's good value for the price you pay.
For the price it came with the frictions,steels and the bevel spring plates. Definitely don’t see a lack of holding power. Would recommend for OEM replacement. Also soaked frictions in motorcycle oil over night.