Okay, I am not saying this is something that is going to get tons of awards, but the idea is interesting on it's own. I bought it for a tenner, expecting something below average, I love horror what can I say. Although I was surprised firstly the serials killers did act like how they were in real life even some fun elements, but I find it funny the only critic gave this 0/10, that shows worth of that critic. Anyway, they are caricatures, but as with horror the most annoying die first. The critic also does not seem to how understand how unlimited stupidity is, referring to the fact they read the book. Of course we as watchers will know it's bad idea, but then we have fortunate fact of knowing they are in a horror movie.
Sorry for the rant, but this was not a hugely bad movie, it had some surprises and outside of small annoyances never felt I need to stop watching. I give it eight, good way to pass the time and one twist is genuinely clever...
The ending, well that shows the critic who reviewed did not even understand what had happened... Plus some of the character's broke out of their clichés which was refreshing.