I just like the idea of a good, professional realistic shooter out there and that it's free is all the better. It's money better spent than recruiters trying to chat up kids at the Mall (I'm reliably informed (by TV) that that is where American kids "hang out"). They do a serious attempt and it's a serious game. I'm sure it's a lot nicer than actual army life, which seems to consist of equipment shortages and bullying, but it is trying to represent actual combat in an informative manner.
If anyone joins the army expecting it to be just like this, well, that's natural selection.