I've heard a few people complain of numbness with eggbeaters, but quite a few more who love them for their weight and the fact that they're a little easier to clip in than other designs.

I just have some fairly cheap Shimanos. I definitely like them, but when I plan on riding the rougher trails, I swap them out for my Wellgo platforms. For "all-mountain" type riders it's worthwhile to have a set of each and a pedal wrench, in my opinion.