My original theatrical review is here and on second viewing, it still stands. It's just not as much fun and labors when it should flow.
As a Blu-ray, the transfer is good, considering the stylized look. On the audio front, the surround mix is hella booming and active; it will scare the pets if you turn it up to your usual volume setting.
The extras continue Robert Rodriguez's really disappointing sparsity of recent releases. No 10-Minute Film School, no Cooking School, not even a commentary track. Compared to the jam-packed Blu-ray for the original Sin City, it's a massive letdown with only one nifty feature present again: The "All-Green Version" in which the movie is run at high speed with none of the virtual sets in place, revealing it was pretty much shot with actors in an empty green warehouse. Otherwise, it's just a handful of brief EPK interviews with a few of the actors and a trailer for the original film. Weak.
Score: 7/10. Rent it.