See it if you enjoy great acting and great writing. Alfred Molina and Eddie Redmayne are at their best.
Don't see it if you don't care much about art, or want a quick, entertaining musical. This is a somewhat slow play that requires you to think a bit.
See it if You love biographies of great artists...or if you want to experience one of the great new scenes (when they paint together in silence).
Don't see it if You don't like two-handers or if you have no interest in visual art or Mark Rothko.
See it if You are interested in the inner workings if the visual artist, and an interesting perspective of a generational gap between ALL generations
Don't see it if You are easily disturbed by vivid imagery