Does anyone else use them and if so have you had any problems?
I had to have mine re-shimmed as I couldn't get gear 4 and 11, which are the same cogs used with the internal reducers.
Apart from that they have been brilliant and I would never go back to deraillieurs
If you don't know they are a german made Hub gear system with 14 gears in the rear hub and a single changer. You can change gear standing still like a car/auto, and as the ratios are linear the "next" gear is usually the one you want.