I'm off out to see this tonight. Haven't read the book, although I kept meaning to, I just always started another book before remembering. I'm gonna go with an open mind, and just see what it's like as a stand alone film.
Just got back, and have to say it was pretty good. Maybe if you've read the book it won't be quite as good, but to me it was interesting, and the plot kept me engaged throughout. I'll probably get this on DVD.