Every so often I find myself in "did I not really get what this book or doing or did I get it just fine and not entirely like it"? The entwined narratives of this novel caught me that way; I kept wondering what exactly was behind the meta-commentary choice. It definitely added to the experience of the novel and the way it called attention to specific things - and it rewards reflection, which I guess is a net positive. But it feels like meta-text on the text rather than entirely integral. I wanted it to be doing more.
The internal story was twisty in all the right ways and I very much appreciated how it worked itself out, coincidences aside. It's not a mystery novel without coincidences.