I haven't seen the 3rd 'Pirates of the Caribbean' yet but I've seen the first one which was good but was it great? It's even on IMDB 250! The forth one was just terrible!
I've seen 'Dead Man's Chest' too, it's not the best but it's still decent and better than 'On Stranger Tides', although the story is rather weak, Johnny Depp gives another good performance, the action scenes are scary, they make it a decent fun movie!
6/10