"Sin City is rated R (Under 17 requires accompanying parent or adult guardian). The film contains a smorgasbord of stylized, generally unrealistic-looking violent acts, including a lot of dismemberment; there is also alcohol use, adult language, some hanky-panky and many women in various stages of undress."
--Manohla Dargi of The New York Times.
I felt the film alternated between laughable and sickening. But meh, that's just me.