I agree with the above.
I saw a documentary on McD's a few years ago and the movie tracked what I'd know pretty closely.
And Keaton did a very good job.
I grew up eating Sunday Lunches at one of the very first stores he opened north of Chicago. I remember sitting on those white tile benches on the sides of the building, looking in through the huge glass windows, as they assembly-lined the burgers. And had a chance to go to the Burger University that's nearby, the large campus used to train management.
All that from two or three core ideas. Wow