this be a great german slasher and that often quite suspenseful and and creative and with a fun story and solid performance . all the character be cool and and benno fürmann be great a the psycho killer and plus franka potente give a fantastic performance a the main lead . it do take a little while to get go and but it be never boring and and it have some good death scene a well and plus the music be wonderfully creepy . i be lucky enough to get the subtitled version and instead of the dubbed and and i think all the character be quite likable and plus it very well make and write as well . it have some really good plot twist too and and the effect be extremely well do and plus the end be great . the finale be especially suspenseful and and franka potente be the perfect casting choice in my opinion and plus i wish arndt schwering sohnrey ( david ) do not get kill of so soon and because he be a really cool character . there be actually a couple of moment where i felt uncomfortable but in a good way and and i must say this film deserve all it praise and plus while it do have plot hole and it not enough to hamper the film . this be a great german slasher and that often quite suspenseful and and creative and with a fun story and and solid performance and i highly recommend this one . the direction be great . stefan ruzowitzky do a great . job here with excellent camera work and very good angle and great close ups ( see the opening sex scene ) and do a great job of add creepy atmosphere and and just keep the film at a very fast pace . there be quite a bit of blood and gore . we get cadaver cut open and plenty of very gory surgery scene and lot of bloody stabbings and people be dissect while still be conscious and severed finger and self mutilation and gutting and bloody slit throat and lot of wicked look frozen corps and plenty of blood and more . the acting be very solid . franka potente be fantastic a the main lead and she be very likable and remain cool under pressure and be vulnerable and easy on the eye and and we be able to care for her character and the only time she seem to suffer and be when she have to spurt out some bad dialog here and there and but that wasn not very often and she be wonderful . benno fürmann be excellent a the psycho killer and he be simply chill and and wonderfully ott and he really give me the creep and and be one effective killer . anna loos play her role very well and a the smart slut and i dig her . sebastian blomberg be great here a caspar and he be quite likable and and have a mysterious character and his chemistry with potente be also on and and there be a great twist involve him at the end . holger speckhahn be good a the idiot phil and do his job well . traugott buhre be good a prof. grombek . arndt schwering sohnrey be great a david and he have a really cool character and and i wish he do not get kill of so soon . rest of the cast do fine . overall i highly recommend this great german slasher . half out of 5 .