It was fun to see actors playing Francis Ford Coppola and Brando and other familiar figures, but unfortunately the main character is an unlikeable douchebag, and even worse, he's boring. Was it in Ruddy's contract for this that every character has to mention what great big balls he has? That got really tiresome, along with his general idiocy and pointless dickishness to the women in his life who have no other motivation than to be around him and help him.
The Godfather is one of the best-selling books in US history. Why was it such an ordeal to make a movie out of it? Maybe because the producers were incompetent idiots?