Well where do you start with this one...
This is a great anime to watch with your friends with a pillow covering your horrified expression and stifling your uncontrollable cringing laughter. I'm not sure anyone watches this out of anything more than morbid curiosity or a dare from your friends. This is how I ended up watching this entire series, and trust me, it doesn't get better with each episode.
The characters are predictable and the story line is pretty disgusting, but what do you expect really? If you manage to sit through this, just remember that you'll be trying to get the images out of your head for a long time. Once again, horrible story, great for a laugh with your friends.