I use eggbeaters SL...I've never broken a one! I've worn the bearings out of a few. I know alot of people that have broken the 'wings' off.
The new ones are supposed to be better quality. The inner bearings are supposed to be improved. They have some cheaper 'Candy' type floating around for about $30.
I don't think any other pedal can surpass the eggbeater for mud, snow, ice clearance. That it why I like them. If it means anything, just look at what the pro's use....lots of eggbeaters out there.
Other pedals fill up with crud. When you try and force the cleat in it can slip and smack you in the shin. Gotta love that!
I have many friends that like shimano pedals. If you can find 520's for $30 and you like them. Buy em. They last a long time, with a steel cleat. I have bent them before, though. And they do wear out, probably not as fast as an Crank Brothers.
The word isn't out on the new Crank Brothyers yet. I would stay awy from the 'chrome' eggbeater. The old ones had problems with the 'nose cone' coming off.