Eric B. rides his Copenhagen Wheel to work everyday.
some of his impressions:
"... It's a unique sensation at first. It's as if the bike wants to go as soon as you touch the pedals. It's especially noticeable in Turbo mode. Overall, it only takes a couple of minutes to get used to it, and then it is pretty much on autopilot. You will notice less fatigue and burn climbing hills. The additional weight from the wheel itself won't be noticed. If you try it, you are going to want one.