I know two guys (at Master level) who ruined that freecoaster in few months, the alloy axle (and its female feature) was too weak for them. They are the kind of rider who don't care much about the parts, they are not the best mechanists out there and high maintenance is not their thing, that could explain that a little, but I would say you should avoid that hub.
Pat Schoolen of Flatlandfuel might be willing to (correctly!) answer to your questions regarding the dimensions and the bearings options