The basic plot line of the film will be familiar to anybody who's ever seen a romantic comedy, but it's grounded by two outstanding lead performances from Bradley Cooper and Jennifer Lawrence and a screenplay that gives them exactly the right things to say at exactly the right moments. I've dealt with mental illness in various ways throughout my life, and this movie gets it right in ways that so many others do not: the anger, the embarrassment, the misunderstandings, the inability to filter, the smug superiority of experiencing this thing that the "normals" do not. If any of the characters had given a "mentally ill" performance, it would have ruined the picture. Instead, they're people that have this thing they're dealing with. It's a warm, vulgar, hilarious, unnerving, life-affirming ride.