I hate saying a game "sucks," but JO sucks. I played it and was cringing at the low quality of every aspect of the game. It reeks of a game built by 5 teenagers in a basement one summer. The vehicles look cool, but every other graphical aspect sucks. The guns are nice, but again, the graphics simply suck compared to BF: Vietnam. 150-players is a nice feature, but BF: Vietnam supports 64 players which is hectic enough. I simply like the feel of Vietnam more than JO. JO feels like playing the alpha of a game that has been in development for two weeks.
I'll stick to BF: Vietnam.
-Lasereth