Difficult to watch....
I've been watching Eastwood movies for almost all my life. I remember getting the weekly tv guide in the local paper and going through the movies to see which ones would be on TV and loved it when his spaghetti westerns would show up along with his other ones.
The Mule is tough to watch because long time fans realize this could be his last movie and seeing him so frail and elderly when we all remember how active and physical he was in movies like The Eiger Sanction and the like. Or the TV show Rawhide.
I really wish he would write a memoir. Not a spill the beans tell-all sort of thing, but one where he really tells the progression of his life and his experiences.