I put about 45 minutes to an hour into it the other night, and I love that it's a truly 3D game.
No blocky dungeons or 90 degree turns here. Everything looks and feels lush, organic, and legitimate. Way better than the exceedingly poor 3D-ification of Mazes of Fate when it was ported from the GBA to the DS, for example. Still early on, but I love it. No idea if that love will last. Still, putting it aside until I finish with Suiko Tierkreis.
Forgot to mention it, but I was surprised when my copy arrived from GS.com with the book as well! That was a pleasant treat.