Steam tells me I've played four hours thus far, I have to say initially I thought it was rather wooden and 'chunky' in feel. Given a bit more time it's starting to grow on me, the first castle 'tutorial' section is a bit average but once you start rolling with the story and interacting things pick up.
Combat is a little daft, not awful, but not great either. I can live with it.
Atmosphere seems to be the game's strong point, it has heaps so far and I'm only four hours in.
I own DA and 19 hours in to that I have no desire to finish it or retrace my footsteps, I think the game got pretty repetitive, attractive in parts but ultimately the same missions sugar coated.
So I'm enjoying the Witcher, I'll let you how I feel after another 4-5 hours.