I enjoyed it at the cinema, but personally I probably wouldn't buy it, at least not at full price. I also wouldn't call it a horror movie, it's more of a thriller really, so if you watch it expecting a horror movie you may be disappointed. Don't get me wrong though, it is an enjoyable film.
it was a good thriller but too many of the "why would any sane person do that..." moments.
It was a great concept & I hear a sequel is a possibility.
Great casting I must say.