See it if you like a good laugh
Don't see it if you can't keep up with lots of action
See it if you enjoy quick-witted British people, intrigue, and everything Hitchcock/Noir.
Don't see it if you do not enjoy British accents, people playing multiple characters, or having a good time.
See it if If you enjoy comedic mysteries
Don't see it if If you don't like run down theaters
See it if you like a silly delightfully delirious British comedy full of physical pratfalls in a spoof of Alfred Hitchcock's movie.
Don't see it if silly physical comedies.
See it if you enjoy seeing one actor portray lots of different roles!
Don't see it if you don't like farce.
See it if want to see a master of clowning do his thing, enjoy "Poor Theatre", like slapstick
Don't see it if you don't have a sense of humor, are a Hitchcock purist
See it if You like your Hitchcock to be mocked and prefer Film Noir. 4 actors on one tiny stage just jumping from one costume to another.
Don't see it if You don't like mystery.
See it if you enjoy madcap farce, watching a small cast play several roles, inventive staging, physical comedy, and are an Anglophile.
Don't see it if you're not a fan of broad humor, or are in the mood for something serious or thought-provoking.