When the film was started I said another American Beauty type film coming. And because of this thought my expectations increased a lot. But Ben Affleck's acting capacity is limited so the movie never goes on. Also the story has some weak points and illogical parts. For example you stole something important and you will use it to blackmail someone. The first thing you will do to backup your source or at least you will not take your source with you when you're meeting with the person that you're blackmailing! But our writers don't think like this so there are a lot of stupid chasing scenes. I think your mood also very important for this film. I was very complicated and seeking something in me, before I went to cinema. Because of this in the film the 'course' scenes and the confessions covered by 'diary writing' scenes hit me directly. So I can't give bad votes to this film. I want to add one more thing, course teacher's acting was perfect. And Ling Bai. She's very different type. She don't like any girls that I know. I think this explains why I like her.
Conclusion, in this circumstances this is a movie for summer. Light scenario, beautiful girls (Rojmin, Ling Bai) and handsome guy.
Your choice to watch it :).