Up there with the worst, I'm afraid to say
***YE BE WARNED... THERE BE SPOILERS 'ERE!***
As a film to numb the mind this is great. It has everything you need. A brainless plot about a brainless guy who manages to anger the Mafia and rouse the sleeping beast of corruption sending him running from everyone except, surprisingly, Owen Wilson, who doesn't appear in this film and that's probably why.
But there is nothing remotely stimulating, and even though I really tried to shut off and just watch it, I couldn't get over how surprisingly awful this film is. Certainly the action sequences are reasonable (nothing special, but the director creates something bordering on authenticity, which I was genuinely surprised at), but it's the plot, and the protagonist (completely unsympathetic, I wanted to kill him before the "Godfather"'s son got killed), and worst of all the script and editing process, which sank this movie like a stone.
The most extreme example of this has to be the ending. Having managed to kill the Mafia kingpin with a Greyhound Rabbit (certainly an original death), the sole surviving law officer who doesn't want to have this guy killed bursts through the door, sees the body, gives an offbeat chuckle and says non-chalantly: "They sure *beep* with the wrong guy."
And the screen immediately cuts to the credits.
I actually did a double-take at this. Presumably trying to get past its awfulness on the basis that your adrenaline is still pumping with the extreme cut from the climax, leaving you with a better impression of this two-dimensional movie, the director and editor conspired to leave out any kind of "traditional" ending with, say, resolutions, tying up loose plot points, the wee lad actually leaving town with his mission complete...
Not the ultimate, ultimate worst film I've seen, but it's in the top five.