I'll admit that this isn't the kind of film I would have watched had I known more about it. What got me interested was a review in Empire magazine's Video Dungeon column, written by Kim 'Nightmare Movies' Newman which said that this contained a Frightfest (UK horror festival) full of exploitation all in one film. He did however go on to qualify this.
Yes, there are several very uncomfortable scenes which could have been exploitative, but they were all in context over a two hour running time, and I certainly didn't expect to be almost crying by the end. The acting was superb (particularly Laura Birn in a brave role I'd imagine most actresses would kill for), and I really felt for the female characters.
Maybe 'enjoyable' or 'entertaining' are not the right words to describe such a bleak film. But it will keep you gripped, and you would have to have a heart of stone not to be moved by it. I voted it 7/10 at first, but I'll have to check whether you can change your rating, as it's now an 8 in my book.