Despite (or because) of the disturbing story, this was a very good film.
Overall I believe the acting was very good: the whole cast delievered a great performance, the scenery was in tune with the storyline, same for the soundtrack...
I didn't find any "offensive" or disturbing scenes. I'm not too easily impressed, but still I think its all pretty reasonable (considering the subject, of course).
I wouldn't invite children, my parents or anyone who's overly conservative to watch it, but for those who appreciate a dense, strong Drama, it's a great option.