This long forgotten corner of the Hitchcock universe has occasionally been called "Hitchcock's Lemon" but I personally feel that title is undeserved.
Sure it's not perfect (a sentence I never thought I'd write about a Hitchcock film) but a bad Hitchcock movie is pretty damned good by everybody else's standards.
The tension and push-pull of criminal behavior meeting it's inevitable end at the noose has long built some damn good dramas but some how Charles Laughton's performance elevates this to near madness. His version of Sir Humphrey turns an average movie villain into a fascinating character, a repulsive yet lovable nut who elevates himself yet pushes down the little guy. When confronted by a "lesser person" about how similar they are and how he's no better then anything else, Laughton nearly foams at the mouth. When the hero unwittingly insult's Laughton's manhood and social status there's a definite moment where Sir Humphrey nearly plugs the unsuspecting protagonist right in the back.
All in all, good but not great film. A must for Hitchcock fanatics.