I can easily say this is my favorite book by Elizabeth Bear. I liked the two main characters very much, the writing was smooth as silk, and probably most importantly, I loved the depth of the mythology. 
 I have a soft spot in my heart for stories within stories, and I have nothing but good things to say about Eternal Night and the Carrion King. The mythology works both as a gorgeous backdrop to the action as well as an excellent world-building tool. 
 Several images, like fields of butterflies along the steeps, the swimming horses, the plane of skulls, or even the armies of ghosts, all of it deeply serves the story and it was all a delight. 
 It had so much, from the tiger peoples, part of the Chinese culture, all the way to germanic legends, but most importantly, this is a tale of the Kahns. Magic is everywhere. So much happens. 
 More than anything, this tale acts and feels legendary. 
 The characters never get so far away from us that we ever lose the sense of who and what they are, and I think the tale gets only better when everything finally interweaves. I'm glad I finally got around to reading this. I think I like Bear's fantasy a lot more than her SF. :)