When I first heard of this movie, I wasn't really interested based on the title. Then, I learned that it starred Clive Owen, an actor I really like. Then, I also learned that it wasn't that serious. In fact, within the first few minutes of the movie, it was said that he killed a man with a carrot and cut the umbilical cord of a new-born with a bullet (BTW, he does!). Now, that's different... So I did go see the movie and it was a great ride!
I had a lot of fun watching this movie, but be warned it is quite violent, as you probably already figured out. And also funny, very tongue-in-cheek in style. Lots of action and shooting, of course, with a lot of humour too. The story is around a baby who gets chased after, hidden, tossed around, dropped, picked-up and taken cared of as best as possible considering all the bullets flying around. Insane. There's also a great chase & shoot-out scene in parachutes near the end, but the baby missed that one.
Beside Clive Owen, the movie also stars Paul Giamatti as the main bad buy and Monica Bellucci, a prostitute who gets stuck in this adventure pretty much against her will and better judgment... Both do a great job.
So if you like dark humour and action, go see this this movie, it's really worth it!