The idea is cute, but this is a slow movie. II nearly fell asleep in the middle. I was beginning to wonder if there was going to be any dialogue or if this was another "Castaway" movie. The kids were mostly entertained but weren't overly enthused about it after seeing it. It was great to have someplace to go on a stormy 90+ degree day. I expected to see in the credits a listing for :"an Al Gore film" - it was that political with a "deep" green message.
Prince Caspian was just as good as the Lion, the Witch and the Wardrobe. My children asked to go see it on the first night, which they have never done before with any movie. They wanted to go back with friends to see it again the very next day. The time goes so quickly that it doesn't seem like a 2 hour 20 min movie. It's got it all.