Writing a sequel was a mistake and I think most of the people agree with that. Title also doesn't reflect the content properly because there is no revenge going on. It was a quick read as most of the chick lit books are and it wasn't completely terrible but it didn't have the spirit that the first book had.
Friendship that Andy and Emily suddenly have is not very believable and a wedding magazine? Not really the important stuff Andy really always wanted to do. I was disappointed with the fact she divorced Max, I feel like the author did it just so she could go back to Alex and have the "always meant to be" moment where the main character always ends up with the big love she has at the beginning of the book/movie.
It's not bad to spend a day or two reading this, but if you don't want to ruin the first book which was good stay away from it.