Ok, been kinda addicted to this thing, been playing it on and off since about 3pm.
Conclusion: It may be free, but it's buggy.
I noticed towards the end of my download, the main program finished downloading and then a patch was downloaded. That patch integrated with main program.
I think they need another patch.
Overall, it's ok, but I've had servers drop me, the Microsoft error window, bodies hanging in mid air, lag, and when I allowed a few extra maps to be downloaded the game wouldn't even load, I had to uninstall/reinstall.
I'm running at 1600 x 1200, I don't think that's a problem, I just feel there's a few bugs to be ironed outta this thing.
To backup this statement, I get absolutely no probs running CoD1; CoD2 and UT2004 at same res.
Still, all in all, it's good online gaming and it's for free, although you could argue multiplayer should have been included in the original retail version of FEAR, most games do that.