Now that I've played a bit more of the demo, some other things stood out.
The soundtrack is, once again, great, the voice overs are uneven, and the game is very stable. I was alt tabbing in and out of the game with abandon, and it was quick, seamless, and not a single glitch occurred because of it. As far as technical polish is concerned, this appears to be Obsidian's best game.
Regarding the voices, the one that stood out negatively was Anjali's. It sounds like Obsidian wanted a magical, out of this world tone for Anjali, but the voice actress really failed to achieve it.
I'm probably going to be playing this a lot, both in single player and local co-op. Just Anjali and Lucas already play very differently, and they also allow, within their own customization, for a bunch of different playing styles. The combat is better than in Witcher 2, I'd say.