Curse was great, loved it. Dead Mans Chest was ok,a little weird but still had moments. At Worlds End was just waaaaaaay out in left field, I'm not certain if I have still caught on to what the heck was going on. There is no way 4 can go back and seem "normal" so I'd expect it to be closer to At Worlds End story wise.
I'm sure DD13 will still flip out and have to see it and go ga ga over Depp and Bloom even though I don't think she could pick either out of a crowd if they weren't in costume.