Best Battlefield yet!!!!!
Although I haven't tried any of the unlocks yet, the use of grenades and the defibrillator will be very helpful, as will all the other cool gizmos they've placed in the game. I find it much easier to kill enemies in 2142 then in Battlefield 2, and that you don't have to be a PRO in order to dominate.
A great game overall, although I would like to see a couple new factions like the African nations. Also we have no idea whats going on in North America? Ya right, the Americans are going to sit around while the rest of the world fights (that'll be the day). Im sure us Canadians are going to want to move south too. Maybe that'll make a good expansion.
In summary, great game!