I can't call this my favorite PKD. of his seven major works (= 10,000 ratings or more), this is my sixth, and I guess I feel the same way as I felt about Neil Gaiman's [b:Coraline|17061|Coraline|Neil Gaiman|http://d202m5krfqbpi5.cloudfront.net/books/1327871014s/17061.jpg|2834844],--viz, shock, horror-- the movie was better. there's some nice SoCal anomie, suburban disaffection sequences going on with spacey new agey conversation in diners or whatnot, but I think PKD's contribution lies in science fiction rather than the slipstream works. I thought:
MAN IN HIGH CASTLE 5
FLOW MY TEARS 4
and the short story/novella MINORITY REPORT 4. then I read much more the back catalog than I've rated, most of which is at the 3 level.
The thing about SCANNER DARKLY is that it is a regional piece; southern Californians like it; the drug culture is part of California so to speak, but I'm not sure of its overwhelming literary value. go see the movie.