I've been looking for a good PC RPG, having finished Dragon Age recently, so first I looked for reviews. Unfortunately, the game just came out, so I only found the French one. Then I looked for reviews for the first game, and found that it got relatively poor reviews. This tempered my excitement for the game quite a bit, but I thought that DKS might have changed all the negatives.
Very shortly, basic differences with Dragon Age. Scenario is fine, with much more humor than Dragon Age. The scenario seems very basic at first, but get enough twists later on to be unusual enough (you meet the bad guy several times, he never kills you, but you'll find there actually is a reason for that).
In combat you only handle yourself, you can invoke few monsters (2 max ?).
It's classless, so you can have a "warrior" that cast firewall and shot explosive arrows, while handling a two-handed sword. Combat is action-based, so much more lively than Dragon Age (but somewhat less tactical), and you can freeze it with the space key.
Quests are really well made, sometimes with different ways to go through, and different conclusions.
Special stuff : You can transform into a real Dragon and blow up stuff
