Just played the demo too, closed it down when it said 20 minutes left (pretty sure I played more than 25 mins?).
As people mentioned very fable like and the game is enjoyable, however unless the demo is a old build then this game could do with a month or two on bug fixing. Either is it was down to drivers or whatever I was getting artifacts and other graphical glitches, I also felt like I was playing Zelda on the wii in terms of visuals and enemys popping in as you approach them.
The Camera feels awful, but that could be down to another console FoV game (sigh) and would feel a lot better with that fixed. That said if your a fan of rpgs it still worth checking out, lots of dialog and decent story and badass old Gnomes to boot but you will get the console port feel as essentially that what KoA is at the moment.