I ride Campagnolo Pro Fit pedal...a Look clone. I use the float cleats. The adjustable release tension is great for riders that climb hard, sprint and kick. Very secure.
That said, pedals are like saddles; largely a matter of what feels best to the rider. Professional racers, world class tourists, commuters and weekend warriors can be found on every brand and type of pedal manufactured.
Speedplay, Look, Time, shimaNO...even the lowly Chinese Wellgo with Garmin power meters all win races on the Pro Tour circuit.