Sometimes the impression you're ultimately left with from a book is based on how well it fulfilled its early promise, or the hype that surrounded it. That's not really fair, I suppose, because the book's quality shouldn't really be based on your expectations. However, it was very difficult not to be extremely disappointed on finishing this book, precisely because I expected so much from it. The early chapters were everything the reviews promised. The conceit was indeed magnificent. There were some ideas here that will stay with me for a long time. But as the book progressed, things got more and more random and capricious, and there seemed to be less and less point. Plotlines and developments were picked up and dropped seemingly at random, and the novel's strong early sense of direction and meaningfulness petered out into nothing. Finally, everything is supposedly revealed in a few pages of exposition near the end.
I don't need a tidy resolution -- I recently loved Meyrinck's the Golem, for instance -- and I'm happy for the journey to be the point, but towards the end the journey seemed a real slog, and the muddled confusedness seemed to be the author losing control of what the story was and where it was going, or perhaps having too many ideas and not fully developing any one, rather than any reflection of the subject matter or any design. And that's a real shame, because this could have been a masterpiece. Overall, three stars covers it. It's still a worthwhile read overall, but I'd have been as happy giving up about two-thirds to three-quarters of the way through, maybe leaving like one of those unfinished dreams where you'll always wonder how it might have ended...