Really disappointed in this film and, frankly, in Eastwood's last three movies with Hereafter, Invictus and now J. Edgar, it's a film that at the end I only ask, "So what?". However, I think I was more frustrated with this movie compared with the other two because you could see there was passion behind the scenes between the costume design and production design but unfortunately the story never really finds the right pacing especially cutting back and forth between young and old Hoover. As for the make-up, it wasn't bad but whenever we get to old Hoover, it's distracting seeing DiCaprio in old man make-up; I think that aspect of the movie (i.e. the older versions of the characters) would've been better served just casting an older actor (like Jon Voight as Hoover).
At the end of the movie, I just couldn't muster up any kind of emotion either way. And given I just spend over two hours learning about this man, I'm not sure I really knew more about him than I did before (and who even knows what is true and what is mere peculation). Performance wise, DiCaprio was fine given his devotion to the roll but Naomi Watts was almost forgottable. Judi Dench at least brings a bit more depth but it's not nearly enough to save this film.
**½ / ***** (C, 4.8/10, 2/4)