I feel I have been waiting for a retelling of the Medusa myth from her POV for several decades, as she always seemed to get a pretty raw deal in the traditional versions. However, while I very much enjoyed this, Haynes' skillful and sometimes darkly funny version turns out not to be what I thought I wanted.
So, I feel I can't give this a rating yet. I am going to need to reread it later in the year, and savour it again, with different expectations.