I'd never even heard of it but came across it in CeX today. I love a thriller so thought I'd get it for dp and I to watch tonight. What a great movie. So cleverly done. It's nice to watch something a bit different.
Acting was great too. CZJ stood out for me. Especially her shanannigans 
Won't say too much or else I'll spoil it.
Also loved The Frozen Ground, watched that the other night. Based on truth though which was sad. Nice touch at the end showing the poor victims.