This film really bothered me - isn't that what a scary film should do? This film is so spooky and sinister, all the more so because of the great parts the kids play. From the main character Esther and her scheming, to the mute daughter Max, who is so cute but yet so convincing, to the son who is also great. It the kids that make this good instead of so much mediocre in this genre.
The adults are slightly less great - the father in particular is a little wooden, but it doesn't distract from the horror / psychological drama. I really enjoyed the bond that first develops with Esther and her new family and then dramatically unravels into something desperate, sad but terrifying.
Definitely a good one for the spookiness of Halloween, I give this 6 1/2 out of ten.