Clint Eastwood's latest filmmaking effort is another case where the final product turned out...decent. Still, this had the potential to be far more than a run-of-the-mill biographical drama - one which fumbles some fascinating subject matter, a tedious approach to storytelling, and even some questionable technical qualities (ex. the "old person" makeup effects).
J. Edgar isn't all disappointment, of course. It does feature some very good supporting turns from people like Armie Hammer and Judi Dench; not to mention, some of the best period-accurate production design (costumes, props, etc.) you're likely to see onscreen outside of acclaimed period TV dramas like Mad Men and Boardwalk Empire.
All the same, Eastwood's Hoover biopic (as a whole) is kind of like Leonardo DiCaprio's performance as the title character: satisfactory, but disappointingly far from the crowning achievement it had the potential to be.