This movie has some horrible reviews in some on-line newspapers however, I never trust reviews that can, at best, say something is "crummy" but can't explain why.(ie- bad acting, lack of quality settings, etc.)
Had a severe case of the giggles for a while after this ended, something the standard scripts of comedy since this came out (and not that many of those, either!) has ever left me with! - I loved it!!!!
You'll need to go into this movie understanding the translation of the Yiddish word "nudnick" and pay close attention to the title to really appreciate the genius behind this one...and understand why "negative" adjectives, used to underrate it, are ironically necessary to the ultimate coming together of the concept of the film.
I do think those who have never seen the main cast work together in the Dick Van Dyke Show, first, might get a different sense of this film but, if you like comedy that isn't based in demeaning others, more innuedo than explicit dialogue and visual comedy, this is excellent. Has surprise appearances by Milton Berle, Irene Ryan, Charlie Weaver and others and a very clever, original use of word play scattered throughout.
If you don't "get" this rare gem & stand-out from the rest style of comedy's comedy, you have no sense of humor!