Don't......please don'tI pursuaded my partner to see this with me because of reviews on IMDB. Big mistake.
Starts off reasonably well. Couple move to new house with a child etc....spooky and well done with some obvious but effective shocks. Thought it was going quite well. Then the guy in make up turns up and what the hell happened? The film fell apart, and some pretty good talent turned rotten and went for some kind of ensemble award for woeful overacting. The special effects are appalling and the "surprise ending" was signposted al the way along.
Avoid and save your money for something more worthy!