Saw this a couple weeks ago, but I've been so busy I haven't had a chance to review it until now.
Overall, I was very pleased with it. Hoffman and Phoenix were every bit as good as advertised, though I honestly don't get the Raging Bull comparisons. Amy Adams did a nice job as well. The cinematography and score were first-rate as well. I don't have too much else to add other than to say it was an excellently-made character piece and worthy of acting and writing nominations, but perhaps not Best Picture.