Ahoy! Pirates beware! ARRRRG!
Pirate stuff is fun. C'mon admit it. It is.
Pirates of the Caribbean: On Stranger Tides showcases more pirate-y stuff, high seas adventures, swashbuckling and sword fighting, mythical creatures, and CAPTAIN Jack Sparrow.
Overall - it's entertaining, especially if you are a Pirates fan. Don't be that person that goes there and picks apart the movie...."Oh, like THAT could ever happen!" Wake up dude, this is the 4th installment of a fantasy series and the plot isn't really a thinker. Just enjoy it for what it is --- pure entertainment and gorgeous scenery.
New elements to enjoy are the character of Blackbeard, a bad-ass pirate with a very nasty ship and crew full of Zombies. Not to mention a smokin'-hot Penelope Cruz. She's fantastic. Love the addition of the mermaids. I don't miss Elizabeth Swann with her mouth wide open, who is helpless and also can "fight like a man" all once (eye roll), but I do miss Will Turner and his fantasticness (that's a new word because I just added it to wikipedia).
I'd say go see it if you value seeing action flicks in the theater. Kids will like this one too.