The best British Isles film since Dead Man's Shoes. And like the aforementioned masterpiece, this is powerful drama with disturbing violence aided by natural ad-lib dialogue and 'everyday' characters, making it all the more convincing, real and in-your-face a portrayal of otherwise normal (or not) human beings who are also gangsters.
It rivals The Sopranos on that point, its strength being its ability to make the viewer sometimes empathise with the characters' familiar everyday problems, even though we know they are paranoid-psychotic sociopaths. It also has that series' charm and brutally graphic elements.
All laced with top-notch black comedy, filmed with innovative editing and camera work. The film will charm you from the off, it will even humour you. Then it will drag you into the dirty psychological dog-eat-dog darkness of both the criminal underground and the human mind, as paranoia takes hold and events run out of control. Great stuff!