The film is a fun concept turning the baseless mumblings of frustrated parents who want to "kill their kids" into a dark horror comedy thriller that brings that often off-the-cuff thought into a warped reality.
That concept, which no doubt all parents can associate with feeling, albeit without any true meaning or intent, blends itself with the ideas of zombie films. and films such as The Crazies, then adds a little bit of the high paced insanity that you will know about if you've seen Brian Taylor's previous work.
The main characters are well written and setup so that you start to have a dislike for some of the teenagers, and grow an affinity with the adults and the frustrations of their adult lives. It's acted well for the most part, and Nic Cage brings his usual own flavour of insanity to the proceedings.
It certainly won't be to everyone's tastes, as other reviews here show, and some people won't be able to get past the unrealistic nature, and the way it's portrayed, but ultimately, it's a fun film, with an interesting concept.
Unfortunately, despite the story, pace and events building up nicely, and keeping you involved, the film is flawed in its lack of explanation or reasoning for this sudden event of mass parent-vs-child violence, along with a rather disappointing lack of conclusion leaving an overall feeling of disappointment at what had the potential to be a good original film; something that is difficult to come by in this age of reboots, remakes and sequels.