I found this movie to be quite enjoyable. Lots of great moments, and great dialogue.
There were definitely some problems: the story was a little messy, it ran a little longer than necessary, and (one of the more heinous sins, IMO) was that some of the more important story elements were told by people who were almost completely incomprehensible. I could understand Davey Jones mostly (though he had some garbled speech) but I found that Voodoo Chick to be completely unacceptable. She was supposedly telling an interesting story, but I needed frickin' subtitles to understand her. Very unfortunate. (Yes, I know some of you will respond and babble "Well, I understood her just fine." Whatever - I don't care. I have enough data points pointing to it being a problem.)
Otherwise, the movie was fantastic. I missed the monkey stealing the gold at the end of the credits (even on a repeated DVD viewing), so I was confused about that, but I'm glad it's been cleared up for me - that aspect made the movie even better. (And I'm glad I stayed to the end of the credits of this one, even though I hoped the dog was eaten.)
I was particularly impressed with the number of recurring characters, which is always something I enjoy. The return of Norrington (especially in his more grizzled state) was especially cool.
I was confused for a second about Barbossa returning ("wasn't he shot dead?!"), but thankfully my translator (read: wife) understood what Incomprehensible Voodoo Chick was saying, so I'm glad for that. Barbossa indeed did die, and seemingly went to "Land's End" which seems to be sort of like the 'land of the dead'. He returned, and thus is now alive. The heroes propose to do the same with Jack - and need Barbossa because "he knows those waters" - since he came from there already.
Thanks a bunch, Incomprehensible Voodoo Chick.
My favorite scenes were the whole cannibal sequence (nothing ever beats a giant pirate-filled ball rolling down the hill) and the three-way combat at the church/mill. The action sequences were simply stunning in this movie, with brilliant cinematography and camera angles. Brilliant, I say!