After beating Witcher 1, I'd almost put it up there with Bioware's best on the RPG list. It doesn't quite have that level of, shall we say, "budget" that Bioware is known to employ, but the depth and difficulty of the combat, the writing, characters, and story, and the insane amount of quests and sidequests certainly went a long way in making it a really good game despite some flaws.
If they can improve upon that, then look out Bioware.