Despite Dr. Casper's fast, almost frenetic pace of speaking - as matter of fact, when he makes his first pause, after 40 minutes, I thought I had accidentally turned off the commentary track - this is a pretty good commentary. He makes a rather good blend of production anecdotes, commentary on technical aspects of the direction, and relavant information regarding the actors and the movie's overall place in Hitchcock's career. And of course, he talks a lot about Hitchcock himself and his cinema, without the pedantic and indulgent overanalyzing that is unfortunately quite common from Hitchcock admirers.