This was one doozy. I now plan on reading everything I can get my hands on that Sanderson has produced. In a nutshell, it's awesome. Any talk of the premise would serve as a spoiler of previous books, so I won't do that, but I will state that I love this series because its overwhelmingly clear that Sanderson worked out his plot meticulously and every bit of the story made sense - both in this novel alone and when viewed as a series. 
 He gets an A++ for story. This novel did have moments when I felt like it was dragging a bit, at 730 pages or so, it was pretty long, but I thought the previous two novels, both of similar length, were tighter. This one just had a more languid pace. I bet a couple hundred pages could have been shaved off and the novel wouldn't have suffered. 
 It doesn't detract from the enjoyment for me though, Sanderson is a master, even if he hasn't been around as long as a lot of other fantasy superstars. I don't care if the subplot involving Spook ate up space I'd rather have seen dedicated to Sazed or Vin, the two real stars of the series in my opinion. I don't care because it's awesome as it is. 
 I think this will go down as one of my favorite series of all time.