Dude, if you're into Fallout, Baldur's Gate, or Plansescape: Torment, get this game. Screw the demo, it might give a bad impression (I dunno and wouldn't care)...get the game. It's a classic and belongs in the lineup I mentioned above. Yes, it is that good.
And that is with the butchered translation. Go download the community fix which adds in the original translation done by CDProject inhouse (before it was cut down [badly] to keep voice over costs down), and you get an RPG with some deep and interesting (and funny!) conversation, catapulting this to an equal footing with PS:T.