The above might sound a little overwrought, but thanks to Argentine director Bielinsky's measured, contemplative style (Kubrick-like in spots) the whole thing works remarkably well. Bielinsky also did the fantastic Nine Queens, another fine neo-noir. Unfortunately, he died after this film, but the two he left behind are well worth any crime lover's time.
Canine lovers take note: The Aura contains one of the best dog performances I've ever seen, a wolfhound that is deadly serious, very Method, basically he Brando of Dog Actors. Or maybe the Meryl Streep (just checked, the dog's name in the credits is "Eva").