It was middle ground for me. 3-3.5 stars. But I adored the premise (of course, that's what made me so anxious to read the book) and still enjoyed the overall story by the end. Mysterious, strange, and dark. Quite liked that. 
 My full review will come later with a blog tour when I host the lovely Yelena Black at The Bookaholic. :) 
 <3 
 Pixie 
 P.S. I've heard some comparisons to Black Swan. I haven't seen the movie at all yet. Maybe it's time I watch it.