Thought the first 30 minutes were excellent. Great build up, the book itself was fairly terrifying, up until the Babadook actually shows up.
Next 45 minutes were pretty meh. The monster itself wasn't actually that scary if you know you're not afraid of hats/overcoats and traffic accidents, although the metaphor for depression is neat it gets rubbed in our faces a bit much.
Last 15 minutes were pretty stupid. Hell, the kid actually defeats the serial killer using Home Alone tactics.
Overall I'd give it a 5/10.
