CGI you can play the demo. It has no spoilers at all and it's rather good. The soundtrack is amazing and so are the graphics. Based on the first scene, I wasn't happy with the gameplay since it was all Fahrenheit. But then I got to the second scene and the detective stuff is pretty fun.
I also found that the quick time events are very well done. Not only for the fight in the first scene, but also when you climb the slippery hill on the second one. I was almost running out of fingers!
I did encounter a bug however, that had me replaying the second scene due to not being able to complete it the first time. And the sound stuttered once in a while. I'm expecting these to be resolved on the retail version.
All in all though, I wanted "MOAR NAO" when I was done with it. First day buy... CONFIRMED!