TotalBiscuit's DNF review after ~5 hours of playing:
Unfortunately, I'm also around 5hrs in and have to agree with that.
It has good moments too, especially liked when I came across a guy yelling at some other guy behind the sets of a studio: "You ----ing amateur! I'm trying to make a scene here and you go wandering around in the background! You know how ----ing distracting that is!?", so yes, Christian Bale reference there. Being, Duke, I knocked him out.
But all in all, take out Duke's character, change the title and you have a pretty darn boring shooter for the most part.