Highly problematic for preteens and younger
I'm surprised to see the rating of age 8 and no warnings on the editor's pick. This is one of my fav all-time movies but didn't want my kids to see it yet (ages 9, 10). Their are scenes of frequent dismissiveness from the young woman to the young man and yet he falls in love with her anyway. It might be a great example of compassion, or it might send the message that it's okay to be treated with disrespect. The theme of vengeance also figures strongly, which I'm working hard to erase from my children's habits (or at least ideation). And aside from the violence in general, there are the multiple scenes of torture.
We ended up seeing it in the waiting room of our pediatric dental clinic. I let it go and then my child started asking, "Are they really hurting him? Why are they doing that? Does that machine really work?" coupled with the agonizing screams heard throughout the forest.
This is, at best, a tween movie. However, I would encourage parental supervision and discussion. If the family isn't in the habit of having these conversations with cooperative or thoughtful children, then I'd wait until they were older. And I love this movie!