I really wanted to see this when it was in theaters, unfortunately Malco didn't show it long enough for me to be off work to do so. The trailer interested me alone, but then one of the reviews stood out calling it "Means Girl meets The Purge" -- which isn't wrong. But, that review is a perfect summation of this film. Add in the social commentary, which is spot on, and the feelings you get because of what happens, it's perfect. The cast is pretty great, a spotlight on Bill Skarsgard of IT and Castle Rock fame being one of the characters that you didn't see the turn coming for. (At least not to the extent that was shown.) And Joel McHale of Community fame, being the creepy a-hole he was.
This is one of those movies that you don't have to take seriously because it doesn't take itself seriously. I hope there's a sequel but with it performing the way it did at the box office, it's unlikely. Shame though.