I just got a dozen of these shafts and so far, they are outstanding. They were specifically designed for hunting. They have a heavier weight on average opposed to other carbons. The insert system so far I've found is ideal, especially if you plan to use fixed blade heads. They will spin perfectly everytime. Others using these shafts are shooting them through plywood and other hard objects and they are taking the beating pretty well.

I cant say for sure how durable they are going to be as I've only had them for about a week, but accuracy with them is very good.

JeffB or others may be able to give you more insight on them then I could.