My experience was like that of geocycle: basically fine from the day 1. 6000km so far. Maybe the hub got slightly smoother after the two oil changes I've made so far, but the change, if any, was minor. Also, it's hard to separate hub from chain. My chain gets filthy very quick on my tours, which are mostly on dirt roads, and cleaning and lubing the chain can make a big difference in how the transmission system works, big enough to swamp any change due to the gears of the hub running more smoothly.