I've been excited by Susanna Clarke's writing since I first picked up Jonathan Strange, and when I first heard this book was coming out, I was suddenly aware that I hadn't heard about her in a long while! Some Googling revealed that she'd been suffering from severe health issues for years now, and this book was the result of more years of hardship than I could fathom. I preordered it immediately, and read it the moment it arrived.
Wow. So different, so quiet, and so, so good.
I've read plenty of reviews that disparage the book (usually because they felt the plot was thin or easily deduced, or because the narration was too simple or unrelatable), but I enjoyed the hell out of it. I was surprised when reveals came, I was drawn into the narration and worldbuilding, and I found the narrator endearing, if a bit alien in perspective. It even holds up to rereads!
All told, I found it delightful, and hopefully you will/have too!