After watching this film, I was left with the impression that there were two competing interpretations of the script - and the director tried to film both. Interpretation one could be summed up as "horror/hostage/screams/blood" - Interpretation two: "psychodrama/disturbing/thought provoking."
There are some very terrifying moments in this film that can have you gripping the edge of your seat and holding your breath hoping that the worst ISN'T going to happen....and then suddenly you are in the middle of a quasi Greek Tragedy with the players making profound orations while the plot stands still. (Exactly what the poems of T.S. Eliot have to do with the plot is never made clear).
I found it a very interesting view with some very genuinely deep moments - but the ending was almost an anti-climax and the schizoid handling of the script did not help matters. It is worth at least a look but you probably won't come back for seconds.