Excellent! Yes, I do think differences between reality and films are a key issue that I'd want to talk about and explore - how do we remember events in the past vs. what were they actually like. A film like this allows for that especially since there are a fair number of books on the topic that can be consulted.
Cranston was great (he's great in pretty much everything he does). And I liked the Louis CK basically played himself (because that's what he does).
Always, always, ALWAYS true!