I don't think anyone could disagree that, visually, it's a beautiful-looking film, mainly shot at night, with red being the predominant colour. It's a relatively simple story which ekes out the long, slow sequences and gives them even further tension the situation already had. Throughout the experience my nerves were on edge as I didn't know when the sudden ultra-violent acts would come. (There is one particularly nasty execution, the only really prolonged violent scene, in which someone is painfully despatched by the use of 'food utensils'.)
I suppose those critical of the film see it as all show and little substance. (After the final credits there was one cry of "Rubbish!" from a member of the audience when I went - though it must be said that he'd thought it worthwhile staying until all the credits had played out.) However, I do think it's a film of some depth. Certainly not for the squeamish, but I would recommend it as a fine cinematic experience, for which reason I offer a score of.............7.