Some aspects are fun, but balance issues plague this game into mediocracy.
The bad: The graphics aren't that impressive. Every weapon is a sniper rifle. The vehicles are horribly overpowered and take way too much damage. Tanks and helicopters spawn to frequently. The helicopters are impossible to take down....especially if a laggy player is flying. (A direct hit with an rpg doesn't even take a chopper down) It's truly magical. Some maps are poorly designed and extremely unbalanced making spawn rape on certain maps inevitable. Hackers are out in force at times.
Battlefield: Bad Company 2 Vietnam isn't anything special and is probably the worst Battlefield experience I've had to date. They could easily patch a few things and make it more enjoyable, but they haven't and probably won't. I hope BF3 isn't a disaster like this was.
All in all, it reminded me of the poorly designed and unbalanced Medal of Honor maps except on a larger scale. I hope BF3 isn't as broke as this effort because this was way to disappointing.