It happens to me very seldom that the book I am reading starts great and goes worse and worse until it sounds like a relief to turn the last page eventually. This is one of those. I'll start with the positive things though.
It is not easy to create a whole dystopian scenario when so many have been created already. All of them have echoes of the pioneers in the genre, and certainly Aziz manages to create a quite distinctive one, resolving in my view the huge problem about technology: how can we imagine a particular technology in the future without the need of building all of it covering every aspect of life. In this novel, the generic destruction of civilisation, the erasure of our daily technology, is well explained, and at the same time it leaves room for the creation of new, revolutionary technology that is the centre of the novel. That said despite that the new technology that Aziz came up with is quite unscientific and weak, but that's not the point now.
I loved some of the characters, some of the situations, particularly in the first two thirds of the book. I think the author is able to create a wonderful story, and very genuine love tales. And that certainly kept me very interested and thrilled. I wasn't that happy with some of the secondary characters, or rather, with how they enter and leave the novel. It looks like at some point the author decides to remove them, or to displace them thousands of miles away, with very little explanation of how that is done or the amount of pain and hope that this creates (for instance, now Homer is the reason for her to live, then is just an undetectable memory fully forgotten; or Lomez, who has the privilege of starting the novel, gains relevance when feels the passion in the corpse's lips, and then disappears for good).
But what really puts me off is the naïvety of the dystopian future (corporations are bad, states are good) and the moralistic approach to the character of the sister, almost a moralistic representation of evil: sex with multiple men, lies, treason, incest!, lack of love to family, conspiracy with the enemy, ambition, etc. That's why the last pages, where the plot's simplicity is more obvious, were a page turner but in the wrong sense: quickly, to start a new, better book.