See it if you want to see a first-rate ensemble cast, a thin but fun story and a sense of humor about the theatre industry.
Don't see it if you don't like silly plots or are looking for something deep and profound.
See it if you like the cast and do not have high expectations.
Don't see it if you are looking for a show with real substance, one that is capable of surviving without the help of well known actors and actresses.
See it if you want to watch masterful performances by all except Matthew Broderick; you are an actor or know a lot about the way theaters operate
Don't see it if you are looking for something profound (it's not Shakespeare); you don't like theater making fun of itself
See it if you enjoy a great cast with perfect timing to hilariously entertain the audience behind the scene of their play's opening night party.
Don't see it if are looking for a serious drama and/or do not care for some over the top silliness.