Seriously the Crampons are brill and im not just saying that cos i import them!
The fact that you are pedalling near enough on the axle means not only is your effective BB lowered (by 1/4" in most cases), you feel less of the dead spot at the top and bottom of the pedal stroke of a normal flat pedal. No other pedal is as thin without costing twice as much. The pedals are designed and used by the Canfield brothers for DH racing, so can take some abuse.
They are expensive (£115) but they are tough despite the appearance and i challenge you not to be impressed once you have used them (sounds like one of those "or your money back" adverts!)