I used to use Sspuds, and now use CB pedals (eggbeaters, mallets and candys)
Spuds:
Pros - last for ever, good solid engagement, adjustability of spring tension.
Cons - heavy, limited float, difficult to service., clog up easily.
Eggbeaters:
Pros - light, loads of float, never clog, easy to service/rebuild, look cool.
Cons - bearings need replacing every 1-2 years, brass cleats wear out quite quickly.