I've been meaning to reread this! I remember really enjoying it. When I first read it in my early 20's I happened to be sick with a fever. I would read, fall asleep, wake up and read again. At a certain point, sick in my room and thinking too much about the book, I began wondering if the the world outside was changing. :)

I don't know how much you like LeGuin's other books, but I highly recommend The Dispossessed. It's my second favorite book.