I saw the midnight showing of this movie and it was so worth it. The costumes were amazing, and the actors, especially. Johnny Depp and Helena Bonom Carter were great. Anne Hathaway's performance was a little disappointing. I just didn't like the way she played the character I guess.
I saw it in IMAX 3D and the 3D effects were amazing. I don't exactly know the difference between 3D and IMAX 3D, but if you're willing to shell out $15, you might as well go all out.