We beat it a couple weeks ago, playing Co-op with a Cleric [me] and a....barbarian? [my wife]. I was somewhat disappointed in the Cleric, maybe I'm just not leveled up enough, but I didn't get a whole lot of use out of his skills. I think we were level 18 or so. We're debating starting over with new character types, or continuing on the next difficulty with our current characters. Probably restart and try another character.
I also would like to see playing time, but maybe they learned their lesson from the Baldur's Gate games [when I saw I beat it DA2 in ~12 hours, I was glad I didn't buy it.]
I liked some aspects of CoN: for instance, the skill tree and the skill levels. It was also, of course a very pretty game. In general a fun dungeon hack. I would have liked, however, for CoN to have the multiple-spell quickselect that DA2 had, rather than just 2 hotbutton spells.