I tried a pair of the Crankbros Smarty pedals but the cost of buying new cleats for all my shoes would have been prohibitive. Also never got used to the lack of 'click' when engaging the cleat/pedal. They did look a lot nicer and were lighter than most of the SPD pedals I have with the exception of the XTR pedals.

Also have the Nashbar Rodeo pedals and one of them has some bad threads/pitch such that it has stripped two of my cranks. I'd use the platform/SPD pedals if I only rode one bike.