Columbiana's biggest asset is Avatar's Zoe Saldana (the big blue girl, Neytiri? That's her).
Lithe, with a very expressive and sympathetically likeable face and amazing physique, she convinces as agile and dangerous enough to pull of most of the insane stunts and vicious combat that goes into this aggressive and speedy actioner.
The film has her as the lone survivor of a massacre when her mother and father are executed by the local drug dealer, and she flees to the U.S. to be raised by distant family where she chooses to become an assassin. So far, so ludicrous - but this is produced by Luc Besson, the man who gave us Bruce Willis as a futuristic cab driver who saves the world, and Jason Statham as a criminal courier who can kick-arse while covered in motor oil and dancing about on bike pedals. As a result, we get a plot where a girl outraged at the execution of 2 people happily kills 23 just to get the attention of the drug cartel, and the Police fail to consult a botanist despite the flower drawing at each scene, instead getting their best clue from a bizarre and unlikely source.
Despite such bonkers silliness, when it works, Columbiana does work excellently as a firing-on-all cylinders gun-fest. The violence is uproarious and over the top, the direction solid and slick (much better than Megaton's slightly limp 'Transporter 3'), and the effects are terrific.
Don't bother watching this if you're annoyed by the lack of a sensible plot, as it will bug the hell out of you. If you're more forgiving of a film as long as it delivers bag-loads of fantastic action, then this is a viable option. Go enjoy.