This ending to the series was unfortunately less strong than the other two books for me. I still liked it, but... it didn't strike me as much. Probably because it was harder to get invested in the new characters, after getting to know the previous ones, as they were spread thin throughout the story? While I liked Asha, I just didn't care about Rhys. At all. I cared much more about AIDAN, the murderous, unstable, evolving-yet-at-the-same-time-devolving AI, so that's telling. (But who am I kidding? AIDAN was creepy AF, of course, that was the point, but he also made an excellent villain you can't get rid of because you also need its help, and... I'm sorry to say, but its decisions aren't even illogical, and even though the characters were all shocked at them, they were decisions someone had to make at some point. In a way, AIDAN allowed them to keep their hands somewhat clean, and no one even noticed it.)
Special mention for AIDAN, as evidenced above, and also for Pauchok. When it came to the human characters, Ella was definitely my favourite. I am torn between wishing she had had her romance part as well (as in, it felt that 'romance was only for the main-main characters', which relegates her to the rank of secondary character when in fact she should've been a main one), and glad that she doesn't need to be in a relationship to shine.
I'm also a bit disappointed at the couples and at certain death scenes. The first one because I'd have enjoyed seeing more diversity in the couples, or no couple for a change (like, not necessarily involving a romantic relationship—friendship is a good thing, too). The second because... well, let's say it didn't go as far as it should have.
Still an enjoyable story for me, but weaker than the first two instalments (which I had loved).