Gone Girl is a terrific movie. I did not read the book. I have just seen this movie and although I loved it at first, I was so disappointed by the ending, totally unexpected.
I thought the characters were pretty well developed, the acting was superb, the direction was excellent. Probably the best way to see it is not knowing anything about it before hand. I didn't know what to expect. From the trailer i assumed the movie was about a violent husband.
Pros
Good performances by all
Strong story
Con
two-and-a-half hours long (Could not find anything else :)
Good enough to pay to watch it in the cinema hall.