Until now, I haven't read a fantasy or SF book by LeGuin that I didn't like. And this one, I love too. I've got the sequels next to my bed, ready to be devoured at night.
I love the epical language (some people seem to have problems with that and the 'hard' words, but what are dictionaries for, and I am even Dutch, so English is my second language), the character development, the heroic view on how life should be.
I love the idea of the powers of magic as depicted in this book. So much more realistic and modest than Tolkien. It makes it much more powerful to me.
What strikes me in this book, as well in the books of Exile and Illusion of LeGuin, is her love for travel stories. The main character always goes on a big quest to find something, to accomplish a goal. And each time it is different, it is written so well that you feel that this next long journey is necessary for character and story development. It deepens the plot, it pictures a strange world that is still quite similar to ours. LeGuin's books are not for the 'heavy action lovers', where long battles occur.
Special as well is the development of the shadow that is unleashed by Geb. It develops into a real human being, it is it's own shadow, and it is finally united with Geb. It makes me think of Yin and Yang.