Played the first two levels a few times over, really love the variety of options available to you, in terms of route, tactics and method - I haven't quite managed to stealth an entire level yet, but nevertheless it seems a bit easy on default difficulty. This is the sort of game I can see myself replaying over and over, though, so I definitely won't object to multiple playthroughs. The AI is pretty dumb and I've found some glitchiness with terrain detection, but for the most part I'm really enjoying what I've played so far.