I just watched this movie with a group of friends. It was a cute movie, and I thought it was a great twist to the standard romantic comedy format.
After the movie, we were all discussing the culpability of Summer in breaking Tom's heart. Some of my friends thought she was a terrible horrible person, while others felt it was his fault for getting involved after she was pretty clear that she didn't want a relationship with him. I agree with the latter position. Granted, she probably could have been a bit kinder, but I don't think she was evil or cruel, just maybe a little inconsiderate.
For those of you who have seen the movie, do you agree or disagree?