Aesthetics, the fact that Eggbeaters were cheap, and the reduced risk of pedal strikes. I haven't had that much of a chance to ride them yet (bloody weather), but I liked them enough to keep them. I had no problems with the Atacs on my roadie, the positive contact at the ends of the float was really nice, and the clip in/out tension was perfect for me, Eggbeaters seems to be less and I don't have any idea when I'm about to clip out, or just floating.. I suppose I'll get used to it in time. I might be selling my ATACs though, because I only have one pair of shoes and I don't mind swapping pedals.