This review is for the whole five book series.  I just finished reading it for the second time and I absolutely love it.  Moon's characters and the plot and subplots are wonderfully nuanced and engaging.  The hero is young and competent but not without flaws and she is supported by characters diverse and complicated.  It is amazing that we can easily accept FTL travel and ansibles and humods and how it all fits together.  I wish Moon would get back to writing space fantasies again!