I've read Life of Pi so I persuaded my wife to go see the movie with me. I wasn't disappointed. And she enjoyed it. It is one of those movies that went quickly to the cheap theaters but it will come back if it gets an Academy Award Nomination.
The movie story was close to the book although it left out one major part where the tiger saves Pi from the cook. That was a good part to leave out. If it was shown the way it was described in the book, it would have definitely made the movie R rated.
I won't tell you much more. You need to enjoy discovering the story again through the movie. Most of the actors were unknown to me. However, I enjoyed seeing Gerard Depardieu who played a cameo role as the cook.