This movie took me into an amazing psychological journey, I went out choked up, couldn't think about anything for the next couple of hours but about the story and how disturbi
ng some of the incidents were, thinking about how bad it feels to be Susan and how hard was it for Tony to get over this tough break up, especially if you've been there before or been faced with similar situations.
If you're interested in psychology this would be one of the best for you, the main character, Susan repeats the word realistic several times, and that was a deep message that implies how can good people with high moral principles fall into doing unforgivable blunders when they overestimate the importance of realism ( which complies partially with that high liberal principles) in their life.