I finally got invited a couple days ago and played it a couple of days ago for an hour or so and I don't have a desire to play again.
The server was pretty empty, it seems like I will have to play a lot in order to get decent weapons/armor/equipment/vehicles, the graphics were poor, and the firefights weren't all that great, especially with my under powered character.
I feel like they missed the boat on this one. If it would have came out at launch, it may have been entertaining and garnered some attention. At this point though, I feel like the game will be D.O.A.