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See it if You like fast-moving American musicals with wonderful choreography and an excellent orchestra-good singers.
Don't see it if You like authentic Weimar atmosphere and good character development
See it if you want to see an excellent performer who sings and dances well
Don't see it if You want to know about Josephine Baker. The writing and songs confuse her with Billie Holliday. The choreography is totally and completely
Also inaccurate to say the least.
See it if you enjoy beautifully rendered 19 C music, pastiche theater interests you, and contemporary acting style grates with elegant texts.
Don't see it if You enjoy skilled choreography, a coherent story-line, good acting.