This wasn't TERRIBLE, but it wasn't much of anything to be completely honest.
There wasn't enough story to balance the sex scenes; particularly in the second part of the so-called book. Lily and Ethan could have been more developed as characters individually, and they also could have been more developed as a couple in order to make their relationship somewhat believable.
Basically the book has insta-lust and a ton of sex scenes, but not much actual romance or story to speak of. If you're into, or even just in the mood, for a book that is essentially erotica, then this book is for you. If you are looking for an actual romance, then you'll need to keep looking.