This movie was THE biggest anticlimax of all time. If you haven't seen it, I'd advice you don't read this post. Even though it's a shit film.
Apparently people in the US walked out crying because it was 'too scary'. PFFFFT it was piss weak, shit special effects, no REAL story line whatsoever.
They should have used the "Diane" woman more (chu know, the woman who experienced the same things as Katie did)
The only good bit, to my memory, was the dragging out of bed. The ending was OKAY but a tad predictable after the scene where she was like 'i think we should stay here, everything will be ok' and got that creepy smile.
It was a good film in the sense that it was reeeeally low budget and the directors that work for them, but it was definitely not 'the scariest movie of all time'
It's only scary in a psychological way, as in it has the potential to make you really jumpy after seeing it, but only if you're in the right mindset. Otherwise it's a HUGE letdown.