I hate the vast majority of comic book movies. The good ones are very rare. But holy fuck, if Sin City isn't a prime exampled of how to adapt a comic to the big screen then I don't know what is. The first one blew me away. Absolutely floored me. I was/am a huge Sin City fan and the attention to detail was all there. Every frame dripped with Frank Miller's presence. He was a co-director. Wouldn't let anyone adapt his books otherwise. And quite rightly. His partnership with Rodriquez is a match made in the sweaty, sleazy, back alleys of Basin City. It's gritty. It's authentic. It's perfect.
Neither of them drop the ball on the second installation, A Dame to Kill For. It's more classic Miller tales very artfully and painstakingly recreated in live action. If you like comics you must like Sin City. If you like Sin City you must see the movies. Simple logic. Can't be argued against.