At points this book reminded me strongly of certain influential works of speculative fiction, most notably Murderbot (corporate surveillance dystopia, cyborgs are people too) and Neuromancer (cyberspace, hacking as a kind of magical system). On the other hand, Okorafor writes confidently from the point of view of young Nigerian woman in the near future.
For me the warmth comes from the details of daily life in (roughly contemporary) Nigeria. On the other hand I don't have much of a reference point other than other books by the same author.
The book is, and is-not "hard" science fiction. It relies (mainly) on technology for setting and plot devices, but doesn't spend a lot of time on the technical details, and in one or two places might be jarring for the nerdier reader.
Content warnings: occasional violence, some body trauma. The moderate amount of sexual content is thankfully unrelated to the violence.