She is hilarious. She is hilarious onstage, and she is also an amazing ad libber offstage.
Second, the movie is a bittersweet look into a life in showbiz.
Joan Rivers is relentless, insecure, angry, somehow endearing and extremely funny. Also, extremely raunchy and extremely politically incorrect. This movie made me realize that she is wasted at the red carpet. Her thing is stand up and if she comes to town, I'm buying tickets.