I loved it. Everyone is so jaded by Hollywood thinking this dude was too boring or stupid. (The killer) The fact is, serial killers are notoriously dumb and get lucky so often.
The roll Josh played jumping between feeling invincible, ODC, and paranoid yet feeling nothing at the same time was incredible. I wasn't looking for gore or crazy super intellect. I'm bored with it being so stereotypical.
This was by far pleasantly surprising without having to be grotesque and violent. It's about a real mind.