Minor stuff aside, TW3 is as good as I hoped it'd be; you can finally also play a witcher, instead of a witcher-who's-on-some-other-quest.
Also, the grass would look better if it wasn't so... unnaturally bright. A lot better. Same issue as with the NPCs sometimes, they almost glow against the background.
Still, the game is very beautiful and the weather effects in particular are amazing. Trees bending in the wind, etc.