I read the book, and the movie was good, but not great. You probably don't know thsi but it was shot to be rated R , and teh studio hacked 20 minutes off it to make it pg-13. This pissed of the director and Vin Deisel. Both said they would not do publicity for the movie last week. I don't know if Deisel relented , but the director blasted the studio here.
http://www.moviehole.net/200815160-babylon-blows-says-directorNot knowing this before I saw it made it better. Now I would give it a 71/2 out of 10. Im not sad I saw it, but i think the directors cut will be much better