I'd actually been looking forward to this since last year, when I put up the cover artwork on one of my Tumblrs. I just started it, but I have high hopes. Ellen Datlow and Terri Windling are two of my favourite anthologists; I own every copy of their "Year's Best Fantasy and Horror" series.
The introductions by the two of them were just stellar, as expected, and gave me about 6 more books to add to my reading list. And apparently there's also a genre list at the end of the book as well.