I find it hard to understand why this above average action thriller managed to upset quite so many people in quite so many ways. It is certainly a cut or two above the typical Hollywood formulaic bang-bang flick and has deliberately set out to be different ... so, if your idea of a buzz is Arnie, Sly or Bruce with no requirement to engage brain cells, this probably isn't your type of film; similarly, if you're expecting Keira Knightley to reprise any of her other, more typical, roles you're going to be disappointed.
The main beefs seem to be at Miss Knightley having to audacity to play a hard-bitten action role; in fact, she does so rather well. In part, this is because she is a good actress but there is a delightful incongruity between the extremely posh background from which she longs to escape and the brutal world into which she does. It would have been very easy to script the role as a hard-nosed, kick-ass, all-American, gun-tottin', apple-pie lovin', tough as nails but with a heart of gold, archetypal Hollywood female action role but Knightley's character is actually far more interesting and her attempts to fit in to the role to which she aspires deserve to have been better developed. As it is, her plummy tones and naivety contrast delightfully with Mickey Rourke's jaded cynical world-weariness and the rage flowing from Edgar Ramirez's emotionally dysfunctional psyche.
The cinematography and directorial style are also decidedly different. Whether you love or loathe the jump shot, stop motion, sample/mix effects is a matter of personal taste; personally, they grew on me: the style is somewhere between Tarantino and Baz Luhrmann (William Shakespeare's Romeo and Juliet) and help fuel the otherwise rather uneven pace of the movie.
Having said that, whilst the film tries hard in all departments, it doesn't always succeed: the character development is hit and miss, the Knightley/Liu exchanges leave you feeling strangely unsatisfied, the plot is occasionally obscure and I still don't know how she got out of the lift ... but it's still worth the rental fee and will pass a pleasant enough evening when the TV channels draw a blank.