Absolutely wonderful. The author manages to create a very involving fantasy universe, with distinct cultures, complex geopolitical conflicts, an array of memorable side characters, 17 different wedding ceremonies (for the same couple), high-skies adventure, and a relationship that evolves over close to a decade--all in a mere 150 pages or so. The descriptions of the floating islands of Ys are particularly magical. The main couple is very likeable, and the author does a great job with the enemies-to-lovers theme, which in other books too often relies on a handful of overly familiar cliches.
Really, this is an impressive achievement. I would love to read more stories set in this world, and even return to this sexy and adorable couple.