I have to admit, this series is not as good as the She-King series. First, there is far, far, far too much info dumping, including a whole info dump by one character about what happened in the first book. Which, okay, sometimes people start with book 2, but wasn't that what the foreward bit was for?
Second, the change in loyalities should have been more developed. It comes across as far too sudden.
There are some good points, more women interacting with each other in positive ways instead of just sexual competition, but the plot that forms the third part of the book is deeply flawed and doesn't make much sense.
Writing is good, and the up until the third half of the book, the plot works