Still not having any issues with gameplay/gunplay. I'm a little past armory station I think it was and if anything I'm finding it a bit easy. Although I'm playing stealthily, when I do use the ak47 it works like a charm when fired in bursts. I have has some intense moments where I'm shooting all over the place but I can't blame that on the game at all. I did turn the sensitivity down a bit, about 5 or 6 notches on each of them.
I haven't played a game with this much immersion in a while, night vision, gasmask, flashlight, charger. I don't regret buying this one bit, hell I have that "like it so much I want to buy another for no reason" feeling that I usually only have when I see a game I like hit $10.