There are so many aspects of this book that should spell automatic success (based on my personal preferences that is): 

For the most part, the author uses these devices and crafts an interesting plot and characters - especially with the unreliability of our main character, Ivy. The use of memory loss and how little we know through her perspective does an excellent job of keeping the reader guessing what is real, what is a dream, and what is actually happening around her. On the other hand, unfortunately, Ivy is incredibly naïve and her decisions/actions are, more often than not, eye-roll worthy, and occasionally, 'what the hell are you thinking' inducing. 

The concept and setup of the plot and characters is promising, but the execution was just lacking. I enjoyed it well enough, but it could have been so much more.