Thanks to those who answered my float question. Interesting timing - I've been spinning before I get The Bike (which may be soon, happydancehappydance), and I recently got a pair of cycling shoes. Tuesday morning was my first class with them, and my knee was acting funny afterward. NOW, the bikes were recently changed out for Keiser bikes, so I suspect maybe that the settings still need adjustment. However, it's something I'll keep an eye on, and will be aware of when I get The Bike and associated pedals (the Speedplay Frogs look quite interesting!).