I thought that The Butterfly Effect was a thrilling, creepy thriller. The cast did a great job considering that Ashton Kutcher and Amy Smart give pretty good performances. A tense, thrilling film, The Butterfly Effect will keep you on the edge of your seat from start to finish. The film is superb in it's style and is both creepy and suspenseful. Some parts are sad and dramatic. The film is very original, and I enjoyed every moment of it. It's a terrific thriller and it also has a few elements of horror thrown in as well. The film succeeds at entertaining you, and considering the cast, its a great film to watch. The Butterfly Effect plays out heavily like a surreal nightmare, and it works very well. Even with actors such as Ashton Kutcher and Amy Smart, this film is very original and doesn't slow down on the tension. A superb film.