Read at your own risk, as some reviewers wrote, you can't unknow things once you learn them, and this movie's description is all of the terrible things.
I watched this immediately after a non-theatrical release became available. Was honestly disappointed. Not only for having no artistic value or merits as a film whatsoever (not like I expected it to be) but the fact that it wants to be edgy yet pulls their punches.
For example, in the "newborn porn" scene, you don't actually see anything. It just shows the lead's reaction to what was heavily implied to be fetus buggering. There's also a ton of cutaway shots from the violent scenes... like the penis-in-the-eye-socket, from what I remember he was just yanking the guys head towards the direction of his crotch repeatedly and we get a shot from behind of his dick exiting through the skull in cartoonish fashion.
I mean the target market of this movie are gorehounds looking for their next high, so why hold back? August Underground has a similar scene to the newborn porn one.
That being said, you're not missing anything if you don't see this. It's garbage. Some "controversial" films are actually "good" and worth experiencing like Salo, House That Jack Built, Martyrs, or In The Realm of the Senses. This one isn't.
It has been almost 10 years now since I had first heard about the plot of this film, and I can say 10 years later with even more so awareness and disgust at the capacity for human shit, this plot manages to disturb me as much as it did back then.