I've played the demo a dozen times now, and I love it despite its flaws. The AI is usually kind of dumb, except when they miraculously spot you. I've been able to get a few double kills by lining up headshots, and a triple kill with a grenade. So satisfying. And stealth is alot of fun with the infiltrator and sniper guys. If you're patient enough, you can pick many of them off one-by-one. My high score is now ~120k.
Just wondering though, how does the rest of the game compare to the first mission? There are different types of missions, right? Does it get deeper, or is it a fairly straightforward shooter?