Well from the brief quick mission on the demo i noticed that "stealth" is out the window, no matter where you are you constantly get shot even though no one saw you, personally i reckon it needs tweaking.
Online play is well amazing! Lot's to do, even though theres only one game type on the demo it's sure to be amazing! Sniping needs tweaking, not to mention the countless glitches that could potentially ruin the whole game like SOCOM.
Anyhow, it's a game to get, a possible long term keeper like CoD4.
Perhaps rent this game before buying? Best of luck to everyone with this product.