Argentinean films are known because of some characteristcis that most people think "this is just OK." I used to think that as well, yet this thriller film amazed me. Insomnia is such a powerful word that might describe You Shall Not Sleep, which refers a not only to a sleep disorder but also of being awake by their your own decision.
Imagine you're an actor/actress whose dream is about to come true; however, there is one condition: spent more than 100h without sleeping in a abandoned psychiatric hospital to personify a specific insane character. How would you feel? How would be your perfomance?
Overall, this film worths to have a chance. I know Argentinean films have no much admiration, but I swear this film is a special one wich makes you think if it is possible to be into a rol as much as in a real mental health hospital.