Here's my controversial opinion, this is one of Brandon Sanderson's best books. It's also one of his Darkest. While not Physically dark, it's the most emotionally raw, and absolutely brutal for the characters.

This is one of my favorite books, and everything is firing on all cylinders. The pacing is fast, but steady. The plot is intriguing and compelling. The world is expanded, and tied back to the original trilogy. The themes are well realized and well delivered.