I went into the movie without very high expectations. I am a fan of Linklater (who adapted the Philip K. Dick story and directed the movie) having enjoyed the hell out of
Slacker and been reasonably pleased with
Waking Life, but I religiously go to RottenTomatoes.com to check movie reviews and it only had a ~60% positive rating.
You can watch the first 24 minutes of A Scanner Darkly, right
here and I did. It's not the best hook, the story starts to dig in quite a bit deeper literally after that portion, on the very next scene and onward.
I recommend it highly. However, know that it's not a happy movie. You'll laugh quite a bit during it, but it covers very serious issues like paranoia, drug abuse, living in world just-clicking over from Freedom into Fascism, lack of empathy, lack of trust and a whole host of confusing questions about Identity and the ways in which we deal with reality.
In short: A number of themes quite familiar to Americans living in 2006.
Anyway, I recommend it. The showing I went to was at a little "art house" movie theater and while everyone was talking about this or that things quieted down very quickly once the movie was under way. By the time it was over every one of the 30 or so people who'd watched it with me walked out slowly, each seemingly lost in thought about the implications of the main character's dilemma and the world they were walking back into which was not all that different that his own.
PB