Overall, I enjoyed this book a decent amount! I was certainly drawn into the mystery, from the very premise of the apartment block being moved very early on, as well as the ongoing mysteries. I love the idea of looking into the apartments, lives, and minds of each of these women who live there, getting a sense of them as we also unravel the mystery. I definitely think the intrigue, setting, and device of the master key were the strongest points of this book, as well as the ending! It was all very exciting to read and I really didn't see it coming, but it felt foreshadowed at the same time. I also enjoyed the criticisms of America's interactions with Japan through the detail of the American Army Major. 

I do think I prefer books that are a bit more character-driven. Just through the length of this work and the fact that the perspective moves around so much, I often wasn't getting quite enough of the characters to become overly attached to them, as striking and distinctive as they were. I would've liked to see a bit more of each of them, but at the same time, I see how that would get in the way of the tightly-woven mystery of the story.