I just got the disc from Netflix and watched it earlier today. It actually wasn't as bad as I expected, but it wasn't anything amazing either. Didn't like it as much as much any of the Marvel movies or Nolan's Batman films. If the poll were still open I would have gone with a B-.
I enjoyed it a lot. The film was dark, visually not thematically, and I wish some scenes were a little brighter. All in all I liked it. I would like to see a sequel but I am not holding my breath.