Sisters benefits from a terrific set-up, a well delivered first hour, a marvelous Bernard Herrmann score, and De Palma's able use of a split screen. Unfortunately it can't carry itself through to the end, and soon collapses into a confusing, formulaic, and ridiculous ending that obviously tries to cover up the fact that, well, De Palma simply didn't know HOW to end the film. Nonetheless it is essential viewing for fans of shock cinema, psychological horror, or cod-Hitchcock fans.
