Me, I loved it lots. I was completely wrapped up in the story the entire time, loved the non-linearity of it and the way it all wove together, and was weeping buckets at the end. Any book that can move me that much is an automatic win as far as I'm concerned. And it's particularly impressive with something that considers itself a love story, as romance seldom does much for me.

But, as the comments above might indicate, it seems to be very much a love it or hate it book -- a really love it or really hate it book, even -- and I think it's hard to predict which column someone will fall into.