Some minor spoilers are below.
Gone Girl is great and you should see it, albeit not on a first or even second date. The spirit and structure of the book are there, and the pivotal murder scene didn’t “feel” as much to me in the book but sure did in the movie. The casting is perfect. The theater was full and there were lines both to buy tickets and to snag a decent seat; I haven’t noticed lines for movies in years.
* The movie is by, for, and about adults, and it’s about adults in an intelligent but well-plotted way. Few modern movies even attempt to hit all those buttons; TV has primarily assumed that role. Attitudes towards and depiction of sexuality are fundamentally adult, not in a pornographic sense but rather in a post-adolescence sense that one finds more often in novels than movies.
* We are often interested, in art and life, in the concept of being “likable,” but that concept is often both poorly defined and easily manipulated. Yet it persists, and Gone Girl effectively criticizes it and criticizes the media more generally by extension the people who create the media—which is to say, “us.”
* Both movie and book work for many reasons, one being that they take existing tensions and faults in many relationships and magnify them by an order of magnitude. A lot of people will walk out of Gone Girl and into discussions about character and compromise. One does not see that in movies about saving the world, in which the good guys are obviously good and the bad guys bad for all the usual reasons.
* Though I’m usually loath to use this term, Desi is the ultimate beta male. Arguably there is no alpha male in the book or movie, with the possible exception of Tanner Bolt, and one could read book or movie as critiquing the “alpha male” ideal.
* David Fincher made Gone Girl and The Social Network, both of which are among the best movies in recent memory.