It is a good movie. Nonetheless, Mr. Depp is just too good for such story lines. XD
I liked the character development of Elizabeth though. She has to choose between the one she loves and the one she wants to be with.
The ending of the movie obviously denotes that Captain Jack is alive or that he can be resurrected or something asides from making the idea of the part 3 clear to the audience. In addition, it is a Disney film; I don't think Disney will kill Captain Jack. XD