I ride a Breezer with the Nexus 8. I love the internal gears compared to the classic deraileur, but recently ran into some troubles with it. I to between 75 and 100 miles per week and a few weeks ago, the hub started slipping. I'd be riding along as happy as could be and all of a sudden, the pedals would slip out from under my feet. It was almost as if the chain were slipping off. My LBS and I tried a few different adjustments and they finally took the hub apart to clean a lube it. That seems to have done the trick, though I admit I was skeptical that it would work. The hub is still not 100%, but the improvement is tremendous. Perhaps it needs an even better cleaning and lube. My only other remaining problem is that the wheel does not seem to freewheel as easily as it did when new. It sounds rougher and even rotates the pedals when coasting much like it doesn when moving in reverse. Kinda weird, but nothing too traumatic. I definitely plan on taking the bike in to have it really looked at. I'm riding in an MS charity event in June and want to make sure everything is tip top.