Best film I've seen in a LONG time. I honestly think this is better than Reservoir Dogs which is probably the film most will compare it to. But it is a far more grounded film and all the better for it.

It owes a heavy debt to Mamet and even has shades Shane Carruth's Primer's visual aesthetic. Every frame is a painting and the performances are uniformly fantastic especially James Badge Dale who does the vast majority of the heavy lifting. It's a pulse-pounding thriller that actually makes your heart pound in your chest. It's a monster of a debut film and I'm in for anything Dunham does next.

Oh and it has one of the best trailers of the year too:
https://www.youtube.com/watch?v=Cu8cfNMu99Y