Shutter Island is the kind of movie you can only watch once. Even though it could be considered a great movie, the twisted ending kinda ruins the build up and any potential future viewings. The detective part of the story is actually really good and very believable thanks to everyone’s performances, which is why people probably like this movie. You are lead down so many different paths, because there’s so many deep layers to the story, that it was disappointing to see how everything unfolded in a rather unexpected ending.