Finished my re-read of Ancillary Justice today and this book is even better reading it for the second time (you can read my review here). Being familliar with the world buildung, the characters and the gender issue made this a much easier accesible read for me. And I still adore Breq and Seivardan, being that odd couple that they are.
I´m already four chapters into Ancillary Sword and I´m really glad that I did re-read book one in the series. I would have been lost without doing this.