"Rated R for terror and violence, nudity throughout" - perfect line for your average snuff movie.
Yet, this movie has a bit more quality. The nudity is non-pornographic. The sexuality shown is sometimes erotic, but not perverse.
The plot: Sadistic killer versus innocent, naive, girl. Seen often before.
After the first 10 minutes I thought of giving this a 4 out of 10 or less, for its stereotypes, standard patterns of story development and rather bad acting and camera work. But as the story developed, it actually became an entertaining movie. I thought the naive girl was believable in her actions, and somehow the camera and sound work seemed to improve as well. Even the nudity was fitting in without being exploiting.
I try to avoid spoilers in the first comment for this movie, so I just try give you an idea of what you might like about it: You don't have to turn away every other scene thinking: wow, this is stupid, why in world would he/she do that? Meaning it's mostly believable. And it's not explicit - meaning that even thought this movie contains cruelty, it does not show it off with lots of gore. It's quite subtle at it.
It's still your basic thriller with some mild horror elements mixed in. No greatness in the dialogues or in the action scenes (well, the ending line it great). I found it enjoyable, only the acting of the supporting cast and the sound sometimes irritated me. I'd recommend this to anyone wanting to see a not-too-violent thriller with some depth and a few surprises.