I would also like to make a few comments here.
I have only spent about half an hour with the game proper, having spent a fair few hours optimising performance (thank you Nvidia beta drivers, vsync off, AA off, obviously no UberSamp, LOD off, but otherwise I can have everything else on whatever settings I want running smoothly at 1920x1080).
Anyway, from what I've experienced so far, I am immediately in love with it. Despite the fact that the damn English publishers have only translated The Last Wish and Blood of Elves, I feel that having read both has made me appreciate how much more this game is centred in Sapowski's universe.
And, to those in the know, within 5 minutes I was chuckling over the mention of "hmm, what was her [wizard] name, something like Conifer" ... teehee.
So, my prediction is I am going to love the whole thing and hope that I can get to grips with the combat well. I shall post back after extensive time over the weekend.
PS, RockPaperShotgun has an awesome "What I think" which is pretty much spoiler-free if anyone is interested:
http://www.rockpapershotgun.com/2011/05/18/pc-review-the-witcher-2-assassins-of-kings/