I thought it was incredible. I was completely absorbed and by blown away by it. I'll certainly be playing it again in the near future.
That said, the first time I played it (launch day), I was so disappointed (a little devastated) and didnt play for more than an hour or two. When I went back to it in July (when Skyrim had finally loosened its grip on me) I loved it from the moment I began playing. I'd say I was enchanted by it and was till the very end.
Amazing game.