See it if you're dying to hear classic Hammerstein songs and don't mind that they're mangled by poor arrangements and incompetent singers.
Don't see it if you value your time. You'll learn nothing about OH (2 minutes on Wikipedia would enlighten more) and you'll have to hear his songs ruined.
See it if you enjoy Hammerstein's songs from some of his most famous musicals. Wonderful interpretations by Doreen Taylor and Davis Gaines.
Don't see it if you like musicals with a plot. There is some interesting video of Hammerstein's life and shows.