Originally Posted by dgalati

Different settings of float give your foot a "locked in place" feel as opposed to a little bit of shim when moving your ankle. Float is a personal preference, you can experiment with the settings (usually 3) and figure out what you are comfortable with. I wouldn't suggest the highest setting (ankles locked) as they tend to cause knee problems, something in the middle should be good. But like I said, test it out and determine what you're comfortable with.