I'm going to read the book now.

Rating: 9/10 (2 November 2014)

The movie was great! The who-dun-it and will-they-get-away-with-it aspects worked superbly. I was hooked and waiting for the reveal throughout the movie.
The characters were especially interesting because so many of them had contrasting strong points and flaws. There were characters that should have been sympathetic, but the character flaw overwhelmed the sympathy, and vice versa.
I suspect I would not have liked it as much if I had read the book first. I'm not sure whether the book will be as good now that I know what happens. Either way, I will probably go back and read Gillian Flynn's two earlier novels.