Forget The Blair Witch Project - this is a true horror movie I have seen The Blair Witch Project, Hellraiser, the Halloween trilogy and cannot even begin to compare them with this movie. This is true nightmare. If ever the acting becomes shaky or the script wavers, you won't find a single viewer who notices it because they will be too busy quaking in their seats. I missed this in the cinema and am grateful for that because I doubt I would have been able to cope with it on the big screen.
This film is scary, and manages to be set in the future and not involve futuristic rubbish like others do.
One thing though, I would advise that you don't see it on your own though...it is too scary for that!