Pros: Lay consistently, fun colored eggs, sweet temperment
Cons: Small size egg (not necessarily a con...)
I have two black, and one blue Easter Egger in my flock. I absolutely love them - as layers, and as far as personality goes. I have two that just want to be held all the time. They are my two sweetest chickens. One of my black ones is not nearly as friendly, though. She doesn't like humans at all, and hardly even tolerates the other chickens. I think she is the exception here, though, because I've only heard good things about this breed as far as temperment goes.
One of mine lays a blue egg, and the other two lay blue-ish/green-ish colored eggs. I'm not sure who lays which color, but I enjoy them all. They are smaller eggs than some breeds lay, but not too small. They fit perfect inside the medium egg cartons from the store. They lay consistently, I'd say each lays 6 eggs a week, sometimes even 7 days a week.
I highly recommend these to add to your flock. They're fun to watch and are truly pretty chickens in any of the available colors.