I've got around 200 miles or so on mine at this point. No problems to speak of, shifts great just like it did right out of the box. I've got a rollerbrake (made for the Shimano Nexus-8 hub) bolted onto it, and I did have to adjust that a while back - just regular cable stretch, no problem to fix.
I've put a couple of posts here about my hub:
I'm a huge fan of this hub so far