Poster for Joaquin Phoenix's Weird Documentary I'M STILL HERE

It looks like the marketing has begun for the Casey Affleck directed documentary I'm Still Here. The doc follows retired actor turned awful rapper Joaquin Phoenix, and I have no idea what it's really about or what to expect. It should be interesting to see what exactly Affleck and Phoenix have done with this. Apparently the film features Phoenix "snorting cocaine, ordering call girls, having oral sex with a publicist, treating his assistants abusively and rapping badly." The movie is set to get a limited release on September 10th. Is this a film you're interested in seeing?