The end of a loved series is always bittersweet, and it was certainly the case here. I liked how this part of Jewel's story ended, although I hope there will be a resolution for Calliastra's dilemma in the Burning Crown. I was surprised about Rath, but like how that tied up.
I enjoy the generally positive nature of the series, as well as the humanity of the characters, particularly the immortals. That said, Jewel has never been my favorite character. Her developmental arc is painfully slow and, to me, more appropriate to a youth, not a mature woman who spent the second half of her life apprenticed to power. I spent a fair amount of time rolling my eyes and telling her to grow up.
The pacing was, for a climax, slow. That didn't bother me as it was apparent, even before knowing about the Burning Crown, that the end of this story wasn't the end of The Story. So much groundwork was being laid for the next series that I didn't mind the pace, or the time spent with the Astari. I also like Avandar, Haval, Jarven, and Finch more than Jewel, so I'm biased.
Honestly, the most negative thing about the book, and series, is the constant rehashing of Sigurne's first sight of Illaraphaniel. We got it the first time, and it's in basically every book.
This book closed the chapter on Jewel, but thoroughly stoked my anticipation for more. How will things play out between Finch and Jarven? What is going to happen with the Astari? With Adam and Arkosa? Isladar and Anduvin?
Unlike some of the reviews, I feel that there is very little filler, but rather, a lot of foreshadowing in this book.