Kristen's performance
Although Kristen is the current "new sh*t" right about now, I haven't really seen a lot of movies starring the young starlight that really allows her to stretch her acting legs.
Years ago she was definitely the one to watch for after seeing "Panic Room". Her movies since ("The Messengers", "Twilight", etc) are certainly entertaining and she does well, but definitely not much to work with.
I thought this movie as a whole was good...definitely not life altering but good. And I have to say that it made me think twice about her acting skills. The moment her first scene kicked in she broke my heart and I couldn't keep my eyes off of her. She was consistent and genuine and believable. Well done :)