I found this book slightly boring and was tempted to DNF it a few times. I enjoyed the concept of the story but I found the way it was written seemed very moving from point A to B and lacked emotion for me, meaning I found it really difficult to be engaged or invested in the plot. 
I also wasn't a fan of the dual timeline and don't think it really added anything to the novel and maybe would have had more of an impact if the timeline was linear, as all it really did was add confusion.