The game gets a big "meh" from me. The demo feels more like a late Beta to me more than something that's ready for release. A demo should be your best foot forward with polish on it. (that's stuff that goes on shoes not people from eastern Europe

)
AI model animation is 8 years old at least. AI's AI is terrible. They run around here and there without purpose, or very little.
since when do should shoot at any target 500m away with a M16a??
It's hard to see anything, but I guess there I'm spoiled from typical FPS graphics and real camo and environment interaction. I think that the model perspective is off at distance. That is, the AI models are too small at "such and such range". but again, that's speculation.
the sound is ALL messed up. things that are hundreds of meters away will at times sound 10 meters away. Directional sound does not exist.
Also, when I installed the game and went to assign my key commands, every key command grabbed EVERY axis of my joystick. So I had to delete and reassign every command. And every time I alter one, the axis' populate it first.

Over all a VERY frustrating experience.
Frankly, Crysis did this much better. Just different weapons and a nano suit.

it's fun, but there are many things I DON'T like about it. I won't be buying this game.
I don't like the way the gun sways when you turn. You don't get the stabilization from a 3 point crouching stance. I personally HATE motion blur. When you turn and look at something, your eye snaps to the object. It's nearly physically impossible NOT to do this. You head turns and your eye "snaps" to what you're looking at. The slight blur when you're exerting yourself is cool though and a very nice touch.
I apologize for the rant, but this game doesn't meet up with the expectations set but the hype and trailers. It lacks polish and the fluid play I thought would be there. Maybe after a few patches, but I don't feel like financing someone's beta testing.

(am I off base here?)