I like it, so far. I agree with those of you who think that the interface isn't quite so hot, though. I remember thinking that DD had the perfect interface, but now with the adjustments for controlling two characters, it is clumsy. Adjusting between weapons and skills sucks, for instance.
Overall, the difficulty level is good (I'm playing on tactical). The only monsters I haven't been able to whack were the ghosts on in the starting area just before the arena pit. Some other combats have been tough, but ultimately beatable using the right tactics (including the DKs mentioned in the last post). A timely visit to the battlegrounds where I went from level 5 to 8 and reconfigured some skills really helped.
About skills: The battlegrounds shouldn't be so expensive, maybe 500 instead of 5000 or so. The other teachers that are in the main quest are much cheaper and more worth it. I wish teachers and skills were more common. I can't really play as a mage yet (I'm in the level with all of the guards and DK patrols) because I haven't found anyone with other than the "focussed elemental missile" (or whatever) skill, so I'm playing him as an archer who just happens to cast a few spells. Overall skill and equipment variety (especially in the battlegrounds) should be much greater than it is.
What exactly is the difference between L1 and L2 BG? They look the same to me.
The music and voices are awesome. The music is suitably epic without getting in the way of game flow, and the voices (even the DK's) are perfect. Some of the interactions with the guards had me rolling on the floor (including the one in my sig).
I remember feeling lost and like "What the hell am I doing here?" the first couple of times I played it, but now I am settling in to the flow of the game, and I think I know what is expected of me. I think that feeling is part of any new RPG experience, BTW. Maybe some people are a little disgruntled because they didn't expect to feel that way going from DD to BD.