I wasn't a hundred percent sold on this movie; there were some plot contrivances that hurt it for me, plus a character I found superfluous and distracting. But other than that, this was a highly enjoyable character study about two damaged individuals who find one another. All the acting is first rate. Jennifer Lawrence will probably win an academy award (Oscar loves starlets) for her turn as Tiffany, and she is very good, but I loved Bradley Cooper for playing the character and not the disease, as a bipolar rageaholic trying to fix his life. DeNiro and Jacki Weaver are terrific as his parents, who welcome him home after an eight month court-ordered stint in a psychiatric hospital.
Think of this movie as a romantic comedy with dark undercurrents and not as a gritty drama with romance and drama. It's entertaining in a smart way.