OK, together with one user from REN, I finished all campaigns, and... I'm a bit disappointed . Why?
Leon: Everything is OK, shooting to zombies is cool, I don't have any problem with this part.
Chris: Exactly as Jgraeme1979 said- it's not RE- it's typical CoD, really, only not-human monsters make a difference.
Jake: Oh, come on- so much chaos, hard, difficult, I died one time, because I didn't know what's going on there. really, I think I not like this scenario :/
And:
- totally not RE spirit- except characters and events, it's completely strange game for me
- in my opinion, graphics are worse than RE5, seriously :/
- as I said- sometimes too much chaos in game...
- well, camera it's not too good, I would like camera from RE4 or 5.
- controls and inventory screen- WTF?
I'm fanatic of RE series, but RE6 (i know, it's demo only...) is not as good as I expected. My rating, for now, is 7.5/10