I thought it would be good but it turned out to be much better than I expected. It is rather funny that when the rumor came out that David Fincher was making a movie about Facebook, many people started to actually trash him (you should have checked the boards on IMDB when they still existed). Indeed, it is pretty obvious that an average director would have made an average flick with this material but Fincher succeeded in making one of the best movies of the year. I mean, I don't even care about Facebook at all, I understand that many people really love it but I really don't care about this website whatsoever. I remember it perfectly, I went to see this movie with my wife in the movie theater and, after just 5 minutes, after the break-up between Jesse Eisenberg and Rooney Mara, I was already hooked. I seriously don't care if Mark Zuckerberg is actually a completely different person in real life, the Mark Zuckerberg they showed in this movie was just fascinating. Basically, the guy was a genius but he didn't look like most of your typical lead characters, physically and mentally. Furthermore, he was a disaster in the way he interacted with other people and this whole combination was just spellbinding to behold. So, the writing was quite impressive, but the directing was just as good and so was the acting as well. To conclude, in my opinion, it was yet another really strong directing effort from David Fincher and it is definitely worth a look.
9/10