This movie is the best biography I have ever witnessed, and it probably will be the best I will ever see for the forseeable future.  From beginning to end, this movie is a tense, dramatic story told from the present and past perspectives.  We get to see characters reflect on decisions and moments together, building the tension and giving much needed context to it all.  The evolution of Zuckerberg's character is well written and the story helps immensly in this regard.  The acting from the three main actors is phenominal, especially as you near the end of the movie.  There's almost no way you can make this movie better that I can think of.  While not nearly my favorite Fincher Film, still highly recommend, especially for people who are a fan of true stories.