One of the best films of the year.

Riz Ahmed gives an outstanding performance, unlike anything else I've seen from him. Such a pleasant surprise to see Olivia Cook was in this as well as I went in completely blind.

As for technical aspects, the sound design is fantastic and used perfectly and appropriately for a film like this, as expected.

EDIT: Just watching the Q&A and found out Derek Cianfrance was also behind some of the writing. Makes sense because the writing is incredible.