Maybe I need to give this movie another try, but I didn't enjoy it the first time. As my father (who loves to poke holes in movies) pointed out, there are no islands in the Pacific Ocean which are capable of supporting a person which don't already have people on them. At the end of the movie, Helen Hunt points on a map and says:
"Here's the charted island you were on the whole time but no one looked there." Have you ever seen a premise deflated in its own movie before?