Harlequin-esque in story (evidence: cover), but well-written overall. The physical descriptions of pain and other sensations are well done (pun not intended), but they weren't enough to hold my interest.
This is one of those trending books that everyone reads and talks about for weeks, and so you either wait until the trend passes or pick up the book and join the conversation, if only to see what all the fuss is about, which I did. Now I wish I hadn't.
[ETA] The more I think on it, the more I think this book is a poor man's rehashing of The English Patient.