I think the concept of this movie is great, but the way its presented is not very entertaining. In the first 45 minutes of the movie Suzy has been killed, and you know who the murder is. Which means for the next hour and a half there really isn't much too look forward to. Personally I did not like this movie much and would give it two stars.
If I were to rewrite the order of this movie I think it would be much better to keep the murderer of the story a secret, by never showing his face. As the story continues on, Suzy would be giving clues as to how it happened, and who her killer was. This way the anticipation last through the entire movie. I would not recommend this movie to others, unless you enjoy be bored for an hour and a half.