Slightly slow at first, but Sanderson picks it up pretty quick. He doesn't short story that well, and this is probably the weakest of his works, but it was still a page turner. 
 I felt like there wasn't enough back story. Let alone how the Liveborns are where they are - there are enough apocalyptic stories out there that I don't have to know what happened to the world - but the motivations for the plot seemed incomplete, and pretty weak.