I just finished this in between reading two books for book club and I found it OK. It struck me that the author did a bit too much man bashing. Was it just me? Every husband or ex was either downright evil a cheat or as in the case of the 'guy on the train' a feckless lad.
I didn't guess what was coming but I wasn't reading it with too much attention. I also found the main character a bit too pathetic.
I had heard that this book was this years Gone Girl but it is nowhere near as good.
I think I have talked myself out of my 'OK' opinion to disappointing.