Finally tried this out... I got mixed experiences... First, the Mumble was bugged on the server I joined, so nobody could talk to anyone, and then when they "fixed" it everyone heard everyone... A bunch of chat spam although the admins tried to get people on their TS server until they fix it for good.
So I decided to switch servers... The other server was nice, although teamwork on the Opfor side was lacking... So we got overrun... That, and I couldn't see from where I was getting shot at all most of the time as almost everyone in Blufor has optics while you're stuck with ironsights. I think the insurgents need some capable SLs else they get stuck in defense and taken out one by one.
That and the "spawn bug" as I like to call it... Basically there's no direct feedback why you can't select the kit (limited/whatever like in FH2) and so I get stuck with a respawn timer of 6000 s with no possible kits to select... what's up with that?
Anyway at the end of the round I had like 3 kills and 12 deaths and I still ended up 12th on our team.
And the point difference in best squads was ridiculous, our best had almost 3000 points, and the Bluefor best almost 7000!
Overall, nice effects, awesome sounds but needs a group of people to play with to be really enjoyable... Oh and while Mumble is nice people generally have their mics set too low so I can't hear half of them.