Don't listen to the other reviewer. He doesn't seem to have grasped or appreciated what makes this film so good - the atmosphere and the characters. The plot is minimal and only serves to enhance these other two aspects of the film. Personally I think this is a much more moody, much more unique, and much more interesting film than Repulsion. It's an acquired taste but if you love stunningly shot character-based films with a twist of surreal humour, I would advise to get it this instant. All in all, an unforgetable film.
Be aware though, there is another version of the disc in a Roman Polanski boxset, including both this film and Repulsion and Knife On The Water. Works out cheaper than buying all the titles individually!