'The Babadook' is a well done horror film, one that is most definitely creepy.
I would've liked more from the monster and how it works, though the film does give you enough and certainly does a fine job at building up the atmosphere of uneasiness that the thing produces. One great part I noticed is the sound editing, which is astutely crafted throughout.
Essie Davis does terrific in the role of Amelia, she shows every emotion that her character is feeling nicely - I felt her pain initially with the kid, too. Noah Wiseman plays her son, Samuel. He is actually quite impressive given his age, there are a few scenes where he adds a fair deal to them.
It's hearty, suspenseful and attempts proper horror as opposed to forcing things like jump scares, which I will always praise a production in this genre for. I wanted a little more, but overall I like this.