Emily and I went and saw this movie on Sunday and both of us would highly reccomend it. Emily isn't a big fan of fantasy type stuff but she really enjoyed it and said she felt closer to Jesus afterwards. If you have read the book, expect to be a little disapointed as I was, but if not, you should really enjoy this one. Here are a couple of helpful reviews:

http://www.christianitytoday.com/movies/reviews/2008/princecaspian.html

http://lookingcloser.wordpress.com/2008/05/17/the-looking-closer-review-prince-caspian/