This had the potential to be something great but unfortunately it ended up being underdeveloped.
Elias started off as a hard-boiled homeless guy, then as soon as he returned home he regressed to a whiney teenager and his character never really recovered. I felt as if the author never really had a true grip on Elias' personality or his history. Also there were points where I almost felt she was hinting that Elias was a synth himself, but that line of thought was either a red herring or me reading too much into certain phrases.
I never really felt the romance between the leads and since Ario was a sex robot it would have helped to know he wasn't just following his programming. There were hints but it wasn't a strong enough connection for me to be sure.
The plot kind of went haywire for me towards the end, things reaching a crescendo and being wrapped up too quickly.
Had some interesting ideas on humanity and what makes us human but failed to deliver on the romance front and a solid end to the plot.