I've had a pair of eggbeaters for probably fours years and bought a pair of candies "special edition" from an online retailer about three weeks ago. Guess which ones broke first? EB's are still going strong (strength in simplicity) and the candies failed me in a race right from the start ( made it through two races, officially). What happened was the spring body just flattened out and wouldn't allow for re-engage. It appears the spring itself just slid over and will no longer keep tension. Kinda confusing because they're so new, this isn't a problem a rebuild kit can fix.
And for that, I choose Eggbeaters immoveable spring design over the Candies. (I'm gonna try a zip-tie to stop the candy spring from sliding over...too soon to throw away $$$)