Very wordy which is pretty par for the course with Kate Elliot. An interesting sci-fi romp that moves at a surprisingly quick pace after the first bit. Still, I can't say I was terribly invested in any of the characters and I put it down for quite awhile without really feeling a burning need to come back. I only finished it because I didn't actually have that much left. It was interesting and engaging while I was reading it. There were a lot of moving pieces that I'm curious to see how are further developed. The big reveal at the end didn't have quite the impact on me that I think was expected and that could partially be because of the long break that I took before finishing it off.
I'm sure it's been mentioned in other reviews but if you're here for the lesbian romance, the relationship is already established and it's on serious backburner to the plot. YMMV on how much that matters to you. The het romance definitely gets more time and exploration. It's interesting because Sun seems like the title character, but this feels more like Persephone's book. After the beginning where we establish who Sun is and what her companions are, she kind of fades into a side character and Persephone is the one who has the more interesting plot threads tied to her.
Aside from the three POV characters, Sun, Persephone, and the other... I really can't remember her name at this moment since everything with her is still very much in the establishment of future-important-character, everyone else just kind of... is. They exist in the story to support the main three but if any of them were killed off, I'm not sure I would actually care because I feel no real connection to them. We'll see where it goes from here.