As an energetic blend of exploitation horror and character study, The Lost is an overlooked cult classic. It has an explosive performance from Marc Senter, who gives perhaps the most charismatic and captivating performance in the genre in recent years. The tense last act and the enthusiastic directing makes it quite riveting. It's also one of the few films that is quite disturbing while being darkly humorous.
Perhaps my very favorite exploitation movie (without pastiche or irony) made since they stopped calling them exploitation movies. But ... 2006? Even that was lifetimes ago, man. I am not going to make an argument that this thing has any redeeming societal value. And it probably shouldn't fall into the wrong hands.