The Witcher 3 (game) is by far the best piece of multimedia I've came across to this day. So my expectations were much higher than what this book could offer. I can't help but compare this book to "A game of thrones". Judging only by the first volumes, AGOT is the obvious winner.
I listened to/read a mixture of the audiobook and ebook and I can't really recommend the audiobook. It was decent, but not engaging enough.