Brilliant, brilliant story. The plot is awesome, the little twists in tale are generously and brilliantly placed. The language of this is much better than that of Mistborn series (at least the first three novels, yet to read the next four). And as with the Mistborn series, I like the way magic is performed. Spren are another beautiful imaginary species he has come up with and their true nature is so alluding and full of potential. Like, there is so much one could do with them.
Overall, I won't say a must read, but definitely a great read. :)