We watched the first four episodes, and then had to stop because it was giving my husband nightmares. It's very, very well done and fairly true to the real story.

I agree about the guy playing Kemper. He is extremely good in an extremely disturbing way. There was one scene where he was talking about killing his mother, and then the pizza was delivered, and he immediately brightened up and was like, Pizza! Aw, you guys shouldn't have! SO creepy. If you look at You Tubes of the actual Kemper, you're even more impressed with how well the actor is playing him.