If you have an Xbox control for your PC use that when playing Witcher 2, I found it worked better than kb and mouse.

Still trying to figure Krater out, feels a little like old school baldurs gate crossed with diablo. It has character augmentation (buy and insert buffs into slots) instead of new abilities when leveling though and I'm not sure I'm a fan of that. I've been looking for an old school style RPG to get into, I thought Krater might be it but now I'm not so sure.