Personally, I try to avoid detailed descriptions and other reviews before starting a book, so as not to ruin any surprises or create expectations. As a result, I had no idea what this book was about (aside from the mystery/thriller aspect) or that it was presented as another "Gone Girl." Perhaps for that reason, I found the pace, plot, and "secret" revelations to be intriguing, and I certainly wasn't bored as I progressed through the book (which accounts for my two-star rating). 
 That said, the character development was certainly lacking for me. I didn't like or trust a single one, which lead to a feeling of indifference at the resolution. From the very beginning, the main character presented herself as shallow and materialistic. I'm not sure if the author was trying to illustrate how her experiences have left her complicated and "broken," but to me, it was hard to get past her immaturity and manipulative personality to feel sympathy. I even disliked the characters that liked her, since they appeared clueless of her real personality and nature. Even what should have been a "win" for her in the end felt empty, and the hasty wrap-up left me feeling cheated, including the small part of me that wanted to see her have some revenge or character growth, the only indication of the latter being (view spoiler)[her use of her real name at the end and acceptance of her past (hide spoiler)].