The movie is simply a brainiac masterpiece. It breaks with all the old molds and standards and charges you with a high voltage of suspense till the end. What else can I say for the beautiful 5 stars that they haven't already said. Simply out of this world. However, I do want to remark something on the negative reviews. This is simply for not anyone. Those folks are SO accustomed to gloat over easy psychological movies that satisfy their "simpleton intellectual egos" that if they resolve it right away they jump on their guns to label the movie negative because they feel fooled, yet the movie is a slap in the face to that particular public. It's in fact made to let you chew on it for a while, and compare ur answers with others to resolve the puzzle which untimely was the goal of the director since he didn't want to hint on his perspective. It is definitely not easy to digest and has lot of psychoanalytical angles but it doesn't make it necessarily worth of 1 star. That's ridiculous.