Most effective, and if this Italian thriller is a little more C.S.I. than Argento, maybe that is no bad thing these days! Storming and very scary start with the momentum not really letting up till about halfway through. For me there is just a little too much soul searching from the otherwise most effective lead, Luigi lo Cascio. This is further complicated by his developing relationship with the also most effective, Bulgarian actress, with the catchy name of, Desislava Tenekedjieva. It is only a slight carp but I felt that at a crucial stage this pause for thought and sex didn't actually help the film. Anyway it is soon back to the very warped and hard edged action and I guess we then begin to wish maybe we had stayed in the bedroom. A very dark and violent film with, if not gushing gore, plenty of gruesome and bloody sights as seemingly random folk get cut about and carried away.