In reply to The New NickB:
I saw it a few weeks ago coupled with a Q&A with the writer/director. I enjoyed it, though had little preconceptions about him.
It had some good footage and interviews with those close to him. I don't think it's meant to be a full profile, but a limited picture of who the director obviously sees largely as a tragic and naive figure. There are some interesting conspiracy theories, but they're a minor factor.
I think it's worth seeing irrespective of your thoughts on him.