i was a frog for years, dyed in the wool.
but then i discovered eggbeaters. now i have eggbeaters on all my bikes, road, fixed, and mountain. they are cheaper than frogs, the cleats are cheaper, and they last longer (no plastic) as long as you have a grease gun.
long story as to why i have so many sets of pedals . . .suffice it to say that crank bros is a very good company that stands by its product.
spd's are crap.