I only have 3000+ on my Nexus 8. They are all primarily winter/bad weather miles. All I have had to do is adjust the shifter cable once or twice. I hope that helps. I did have the 7 speed version previously and I think the 8 speed runs smoother and shiftser better. Strictly opinion though. I did not do any "scientific" testing of the two hubs side by side. I got the hub, shifter, cog and wahsers, bolts etc on ebay for about $150 new. I had a local shop build the wheel for me.