That's really the biggest problem right now, no music and limited sound effects really hurt the immersion [which is a big part of most RPGs for me], so it's hard to really dive head first into this game. By no means is it a bad game, it's simply not currently in a state where I feel like I can get the most out of it. And really, the music in the Divinity series is always really top-notch, so it's absence is very noticeable.
Having said that, here are some things that I liked from the little bit that I've messed around with:
-Being able to role-play two separate characters. In nearly every dialog, you're presented with the ability to choose responses for each of your two characters, allowing them to agree or disagree on just about everything. And it's not just window-dressing, the responses provide small bonuses and subtly nudge the personality of each character in one way or another.
-The city near the beginning of the game is REALLY BIG. Lots of opportunities to explore and get into trouble.
-Small quests that pop up occasionally. As you arrive in town, you see people rush to the docks where a ship is on fire. If you've got an appropriate spell, you can douse the flames. If not, you get to watch it burn to ashes. I'm looking forward to seeing more of this sort of thing as the game goes along.
-Combat's a little simple, but you're given plenty of skills and the like to mess around with.
I really want to play this game in all it's finished glory.