I'm a mess. Review to come when I'm home and can cry over my keyboard as I type. 
 edit OKAY. I'm home. I'm still a mess. 
 As with the previous book, things were a little slow-going at times. I was waiting for stuff to happen, and usually not very much happened, but when it did... I don't know what I was expecting from the ending (there was stuff I knew was coming, as I've said 198273232 times, because of Crooked Kingdom, but DANG) but it ruined me. I guess the book is aptly named. Ayyyyyyy. (imagine a little sunglasses-wearing-emoji here) 
 Anyway: it was tragic and upsetting and bittersweet and I don't know how to feel. Alina and Mal seem to have found their happy ending, but the lines in the 'After' section that go over how there's an emptiness to them both... It hurt. And then Nikolai. Poor, poor Nikolai. Wearing gloves to hide the scars on his hands, living with the things he did while transformed. I wanted to wrap him up in blankets and make sure he was okay. 
 And The Darkling. He was awful, twisted, manipulative and a terrible person and I hated him for what he did to Alina and Baghra and Genya and Nikolai and just about everyone but I still felt like crying in those last few scenes. What a sad, lonely character. Ugh. Everything hurts. 
 I'm tempted to go back and read Six of Crows and Crooked Kingdom again because I feel like all of this extra bg/world-building knowledge might make it more enjoyable. Maybe. We'll see. 
 In summary: I enjoyed this trilogy more than I expected. Not as much as Six of Crows or Crooked Kingdom, but still. I'd definitely recommend it if you've only read the Ketterdam duology.