I love the dual timeline, dual narrator unraveling of this story. It's an interesting and thought-provoking approach to both true crime and women criminals. 
I have to say that I have some lingering questions/feelings about some pieces of the story. However, because I was listening to the audiobook (with lots of distractions), it's very possible I missed bits and pieces throughout. The epilogue definitely left me wondering a couple things, and I do think that that was intentional on the author's part.