I saw it and it was pretty good.
But it was kind of cringy, to me, at least. Val came across imo like some high school theatre geek who had way too high of an opinion of himself.
The part where he was filming John Frankenheimer and Frankenheimer told him to put his video camera away? Give me a fucking break. That's chicken shit. And the more I watched the more I thought that Val is chickenshit, petty, and arrogant. He's a good actor but imo he's not THAT good. (and the interwebs buzz is that Kilmer burned somebody) Frankenheimer (of Manchurian Candidate and Ronin fame) shouldn't have to put up with petty actors like that. So, in that sense, fuck Val.
***One of the most famous stories about Kilmer’s attitude problem came from the set of the 1996 science-fiction horror film, The Island of Dr. Moreau, a notoriously difficult production. Kilmer reportedly showed up to set late, started arguments, recited lines meant for other characters, and, infamously, burned a cameraman with a cigarette. (Kilmer and the movie’s producers say it was an accident, but others say it was intentional.) ***
And fuck the Christian Scientist approach to health care. Val didn't have cancer, he had a "suggestion" of cancer.