Good play. Say you just call and no Ace falls on the flop, they are both probably going to fold the flop anyways.. so you would have the same result. And if an Ace happens to fall, well let's not even think about that.

A hank like KK is strongest before the flop and gets weaker each time another card is turned over. You got your chips in the middle when your hand was strongest, which I think is good play.