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See it if You love a show that interacts with its audience.
Don't see it if You don't enjoy audience interaction and don't like not knowing the outcome before the show.
See it if You love a good story and beautiful music. Also if you love the Wizard of Oz it is great to supply a backstory to characters.
Don't see it if You hate musicals and or you don't like the Wizard of Oz. Also it has a sad but happy(ish) ending so if you hate sad endings don't see it.
See it if You love a storyline that is beautiful yet sad, also where the "villian" is misunderstood and you feel for them.
Don't see it if You don't like musical-opera style singing or if you don't like sad shows.