Exceedingly sleek (genuinely beautiful to look at, while invoking David Lynch in moments - especially Mulholland Drive), consistently tense (on multiple levels), and impressive in the way that the visceral impact of the physical violence in the 'novel' narrative works with the emotional harms wrought in the film's real world, and also in the way in which, depending on how you read the ending, it maybe offers meaningful and hard-won progress for one or even both of its main characters in its 'real' world. It doesn't hurt at all that Amy Adams is right in the middle of it (quite the one-two with Arrival, and honestly she was the main reason I watched this one) and Jake Gyllenhaal is just as good, maybe better - both are genuinely powerful.