Watched tonight with my teens and have to say it is so, so, soo stupid.
It's definitely a movie for horror/gore fans for the sake of it. The plot and its contrivances totally nuts. Characters are pig ignorant and generally play to expectation - apart from when they don't, just to make it even more nonsensical.
The directors obviously loved the lead's you took my dummy sulk face and overuse it.
Is it bad? Yes. Is it so bad it's good, Well, yes in part, but mainly due to the crazy kills that had us all laughing out loud a few times - more so than several comedies of late. There's the odd EWE! moments but nothing too bad and the absurdity destroys any real discomfort.
The only unexpected flashbacks it gave me was to Sharp Objects - which is no bad thing.
I noticed this is yet another thing online that has the ending laid out for the weak of mind and character. Harry Enfield and Paul Whitehouse really were before their time.