... but I've only watched the first two episodes.
After I started watching, it just felt to me that I was missing a lot since I knew it was based on a series of books. So I've been working through the books slowly and now I'm reading Books 4 and 5.
If I understand correctly I'm well ahead of where the show is, though I hear the show has made some digressions from the books.
I don't really know why I haven't finished watching the first season of the show yet. I'm sure I'll get around to it eventually.