I tried the demo and found it to be ok. Locking on to enemies and rolling around dodging shit can be a bit rough. I think they did a decent job w/ the in game menu.
I heard there are TONS of weapons, items, etc and that is sort of a grindfest type game. You get to go replay levels and can jack up the difficulty to earn more shit.
The graphics do look great. Didn't get much of a story in the demo.
here's a decent look at ithttp://www.youtube.com/watch?v=qdS8f1KDkZg