"Terrible Narration"
The worst narration I have ever put myself through. Authors are not always the best readers of their own work. The concepts introduced are pretty deep and an occasional pause to allow them to sink in would seem to be called for. But the author blows through so quickly that you don't even realize when one chapter ends and another begins. Read the book, it's well worth your time. But don't buy the audio unless you can find it narrated by a professional.
"Disappointing"
Where to start ... characters are unlikable - especially the heroine - and despite plodding through 40 odd chapters the plot failed to improve. Don't waste your credits.