Mixed feelings about this one (spoilers)
The premise is very interesting (some claim about being based loosely on a real person's story)
Once Alice learns the truth, and reads about civil rights activism, she transforms into a revolutionary and the movie turns into a 70s bad-ass revenge flick.
It's hard to believe that she would easily turn from a meek enslaved woman to a tough strong black woman, instead of suffering from shock and trauma.
Overlook that big leap in logic and this movie is both a though provoking story and a fun cool 70s revenge flick.