Memento

Yes, it's true. The entire movie is based on a gimmick. However, I honestly feel that this does not cheapen the picture in the slightest bit. I loved every scene; discovering information as our lead character discovered it. It demands a second and third viewing, as there are many subtleties and quick flashes that may not be picked up on the first time around. Its one of the most original films ever made, and for people who scoff at the concept of not having a short-term memory, it actually is a real condition. Watch this movie. And, please pay attention. The performances are wonderful, and its structured magnificently.