Very good! It made an appropriately epic end to the trilogy, and Jalan stayed in character all thru til the end, while also showing the signs of growth he manifested in the earlier books. A good trick, to show a character changing while still being recognizably the same person. I'm glad that Lawrence pulled that off. 
 Only point I could lay against it is that while most of this trilogy did a good job of standing on its own, the ending here *could* feel a little bit incomplete if you haven't already read the Broken Empire trilogy. But given that the trilogies run more-or-less concurrently I suppose it makes sense that their endings would best be taken as two pieces of a whole.