I think that this film is really good beacsue it builds up suspense beause when you see the boy walk up the staires and he hears a voice talkin to him, you are wondering who is talkin. and when the voice gets agressive u fell danger for the little boy.
I don't normaly freak out like this but i watched it at night and it gave me NIGHTMARES!!!!
Here is the clip with the boy on the stairs;