This film would be far more enjoyable for someone who has never read C.S. Lewis' Narnian novels, but was enjoyable nonetheless. Technically, the film was well-done and the effects were enhanced by its 3D presentation. It is thus far the shortest of the three films released to date, coming in at under two hours, and it might have benefited by an extra 30 minutes to allow for more plot exposition. But no one asked me my opinion when they were filming it...
There are differences with the book, mostly having to do with merging two or more scenes from the book into one scene in the film. The scene involving the arrangement of the seven swords was an invention, but did not do that much damage to the overall message (unless you are a purist).
This episode is the last in which the Pevensie children play major roles, but the addition of Will Poulter as Eustace Scrubb was a brilliant move. Poulter played Eustace jut as I imagined him to be as I read the book. If the Silver Chair and The Last Battle are filmed, his will be a performance to look forward to.
For me, the final scene in the book where Aslan speaks to Edmund and Lucy, explaining to them how they will encounter Aslan in their own world, is the key to the entire book. I am pleased that this film preserved that scene nearly word for word.
Is this film worth seeing? All-in-all, I would say yes. Hopefully it will inspire a new generation of readers to delve into The Chronicles of Narnia, and experience the joy of Lewis' allegorical presentation of the Christian message.