I’ll still say it, read the book. I’ll recommend Wanted based the visuals alone. In fact check out NightWatch and DayWatch.
The story has some holes but I enjoyed it. I tend to be critical of films translated from other media but just tried to watch and enjoy and it was fun.
2 Things I wanted was Chapter 2 and the Ending from the comic to be reflected well in the movie. It wasn’t an exact reflection but I enjoyed it.
I’ll prolly get more into details on my site.