Several guys off Raptor Forum run them and have good results, Albas Rep is a member and gives a good discount, A good thing about them is that you can still use the stock loc nut unlike Tusk, G Force or Durablue that use the 3 piece design. I prefer a screw on OEM style nut, I personally run a RPM Dominator 2 XC axle and a LSR Axcalibar on my YFZ's and have zero complaints. It really depends on budget, The albas price is great.
It's been on for over a year. I ridden it pretty hard but don't race it or jump a lot....more desert and dune riding. My friend has had his longer and hasn't had any issues either. Good bang for the buck and I think they have a pretty good warranty (haven't needed it though).