The truest movie that is based upon Philip K dick books and topics (the drug abuse and the damages that produces to the body of a person, the unrecognizability of the reality and of the self) that I've watched so far. And thus the most difficult to follow. The cast is unbelievable, I dare to say that I never watched a movie with such a cast, with 3 actors and an actress that could be lead actors in any movie they would want to, immediately before (Robert Downey Jr and Woody Harrelson) or after (Keanu Reeves) the peek of their careers. Not to mention Richard Linklater, that maybe cannot be defined as a cult director, but directed some really cult movies throught his life. But then "A Scanner Darkly" is a movie for really small audiences, so niche, with a very particular cartoonish style, that everything logically strides. You don't get a WOW effect, just because you are too surprised even for that.