I have loved every book in this series, and this was an absolutely perfect conclusion. I cried so many times! I've always loved the Discworld witches...they're important to me, as a woman, especially a somewhat Type A woman. And seeing a girl dealing with growing up AND all that magic and responsibility and choice and careful manipulation of power dynamics is just...AWESOME. And Letitia got her due, too! I love that there are no scapegoat characters in Discworld. No one is there just to be A Jerk or The Romantic Rival. There's something big-hearted and fair-minded about Terry Pratchett that I really, really appreciate.
Plus I was very pleased with how the romantic plotlines turned out!