Masterfully done. Not for small children, it'll give them nightmares or at least scare them.
It was odd at first as it deviated from the actual Dante's Inferno. But once I had the mindset that it's all new it was gripping with its interpretation and the amazing animation and acting.
It's a powerful moral epic.
Epic defined: In literature: ."..usually related to heroic deeds of a person of an unusual courage and unparalleled bravery."
You'll enjoy it.