The Founder: I enjoyed it, wonderful acting by Michael Keaton. I didn't know anything about the birth of Mc Donalds Inc prior to watching the movie, so the novelty of the story worked my way but it might spoil it for people in the know.
What I really liked is that the movie did not shy away from taking a slices out of the American dream: it's not only just about hard work nor opportunities, it's about ruthless ambition and having good business lawyers.
Fun fact: Mc Donalds is not in the Hamburger business at all.