I surely liked how the author wrote about sexuality and genders. The fact that A is genderless kinda tripped me for a while. I liked that we got to see many characters with different lives but I think that the obsessive thoughts about Rhiannon and love shaded their stories and I think they deserved to be told in more depth. It was a good chance to write about interesting issues and I think the author just wasted it.
Tiny little spoiler allert.
I hated the ending. I understand the author wanted to be poetic and wanted the two of them to fall asleep together and live like a normal couple for at least a day but Rhiannon had told A she needed some time on her own to overcome the feelings she still had for her ex. A, instead, thinks it is better if s/he finds Rhiannon a more suitable companion so she won't be alone when A will be gone. Because what says love more than a replacement of what you've once loved? Plus Rhainnon is going to wake up in the bed of a stranger, this stranger will only have fake memories of her. Isn't that creepy? Creepy and patronizing?