I went to see this film at the cinema with a friend. There was a group of rowdy teens at the back, all talking and laughing loudly. Within 10 minutes of the film starting, the whole room was silent.
That is the genius of this film-it is so intense, you will be on the edge of your seat from start to finish. Using a combination of well timed jump-scares, brutal and horrifying 'found' footage and an eerie soundtrack, this film is a triumph and I would highly recommend it to any person into their ghost films.
I would strongly advise that no one buy this film for their teenage children. This should be an 18. The film deals with a lot of extreme topics, and the found footage certainly wanders into the realms of 'bad taste', graphically showing various horrific murders, with extreme realism. Even for me, a hardened Zombie/Horror film connoisseur, this was almost too much, so I would definitely advise against buying this for a 15/16 year old.
It is still an excellent film due to the realism and tenseness throughout, 5 stars would highly recommend.