just played the demo, i thougth i was going to hate the nano suit as i prefer more pure modern/slightly futuristic shooters but seriously, it is very well designed.
i have to check some settings as my 8800gts and q6600 at 3.4ghz with 3gb of ram was put to the test at only 1280 x 1024 with medium settings. something is not rigth but anyways, the game looks great and feels great.
however, on normal difficulty, the enemy ai was pretty dumb. i could reveal my location, then back off running and they would just resume their posts sometimes. i should try harder again.
but yeah, the big thing for me is i was very aprehensive about the nano suit and i am in love with the way it can change the game.