The first one was really bad, but in a charming way. At least I made it to Chapter 3 before I got bored and gave up.
As for Witcher 2: I think the Prologue was really nice, but after that... I dunno, technically speaking, the game does everything better than W1. Also better dialogues and better cinematics, if you're into that thing. It's just that the game doesn't really pick up speed, it lacks direction, and that compounded with very severe balancing issues (like you need 3 attempts to beat some Wrath, next time you load up the game you beat 2 of them in the first turn) and the horrible UI (mainly Inventory) and the totally unclear magic system (Aarg, Gaart, Faart, etc. I mean what?) somewhat makes it an obstacle to really delve into it.
Final verdict: Witcher 2 is overrated, Dragon Age 2 is underrated.