The demo was a lot of fun, but the AI was really quite easy. The triggers were almost painfully apparent, and I was able to snipe most of the Russians from beyond their 'visual range' which kept me from feeling like Indy (which is the point of the game, no?).
Still, it was fun exploring and trying things. The puzzles weren't too hard, and even a novice to third-person action-adventure games such as myself felt comfortable with the controls (well, given a day or so).