I cannot think of a single thing wrong with this book. I don't think this has ever happened before. 
 The characters are amazing, morally ambiguous or downright nasty and yet I was still rooting for them the whole time. And so individual & distinct, the shifts between various points of view really added to the storytelling, giving differing perspectives, insights, conflicts. If I was going to criticise anything, it would be that I'd have liked to see Wylan's point of view as well, as it felt a little odd him being the only one of the main six who you don't see, but it's such a minor point. 
 The twisty, turny plot was amazing, keeping me on my toes & waiting to see what tricks they would pull out of their sleeves this time. There were so many layers of conflict, from the main heist to double-crossings to rival gangs to backstory coming out a little at a time & conflict between the members of the crew. 
 The world is vivid and gritty and adds to the story's character, and as if that wasn't enough it keeps hitting you with lines that stick in your head long after the book is done. My personal favourite (without getting spoilery) - Maybe I liked your stupid face. 
 An absolute page-turner, and with such a cliffhanger of an ending, I can hardly wait to get my hands on Crooked Kingdom, not only to see how it's resolved but just to spend a little more time in this world.