I ride platforms, but its just a comfort thing for me. I can't get into the whole being semi stuck in any situation. Even the split second I would have saved may always be enough.

Straightout though, this stuff improves your riding so much, its unreal. I easily picked up an extra 7KMPH and uphill was a breeze. I think its just a matter of paranoia and lack of trust of my self that I don't ride with them. That, and I don't like spending money, or having two pairs of shoes on me (clipless)