I read The Hundred Thousand Kingdoms in mere hours. I was up until around 3am trying to finish the book - it was that good.
I loved the narration. Usually first person narration falls a bit flat, but it actually felt like I was inside Yeine's head, listening to her thoughts. I did have to go back a few pages a couple of times as the storytelling isn't (always) chronological.
Despite not having a voice of their own, the other characters are exceptional too. I wasn't quite convinced of Scimina's character though - she was incredibly sure of herself for someone who knew she was a bitch.
I've actually had one of N.K Jemisin's books on my to-read shelf for a while, but I didn't realise she had authored The Hundred Thousand Kingdoms until after I had finished the book. I have to say, after reading this book, The Killing Moon (and the rest of the Inheritance Trilogy)is definitely getting a bump up on the to-read list!