I bought this novel because I've always wanted to watch Fassbinder's filmic adaptation "World on a Wire," which has just been released on Criterion DVD. I wasn't aware of a second adaptation of this book ("The Thirteenth Floor") until I was in the middle of reading it, but I'll have to see it, too (because I enjoy how adaptations work). I will be reviewing both soon... (Update: I have reviewed both filmic adaptations).
The story is slow paced in the beginning, and it takes some thought about what is going on - and that continues throughout the read. It has political and capitalist criticisms, as well as an immeshed love story. While reading it, several movies came to mind: the headset of "Brainstorm," the darkness and mystery of "Dark City," the environment of "Blade Runner," and a little bit of "The Matrix" (not as much as other reviewers seem to emphasize). It is well-rounded, but I became confused several times, having to go back and reread once in a while. In the end, I enjoyed the story, and I believe a sci-fi reader would, too. It has a film-noir feel to it.
It was written in 1962, and some of what was futuristic then seems to be working its way into the present. Personally, I find that most pre-CGI sci-fi writing has a more human level, which is apparent here. Psychological analysis may be fun with this one, especially the ending. Oh, how I want to become a pollster (sarcasm).
4 of 5, mostly because of the confusing narrative, but a good read.