Unlike BF2, SF is unbalanced, unfair, less motivating, and i had terrible instantiation problems, plus no good for team
you don’t have tier2 unlocks, BUT SAS and SEAL teams get new weapons, those weapons are a major advantage, HOEVER the opposition gets UNGUIDED AT rockets what makes the huge unbalance even worse, this effect gets amplified because most players like to play with the new toys(weapons) so if they cant join SAS or SEAL then they only idle till next round or simply go to an other server, so 80% of the time SAS or SEAL wil win,
then if you log in to any SF server you notice there are no more squads, that because there is no advantage on those maps for much team play - this by it self if only a negative thing if you love BF2 for team play, if you play it as doom-clone then of course no problem
grafix is a bit better and so is the placement of strategic objects but for some unknown reason the game is slower, nearly every one had to lower the quality setting - in fact the install do it for you
so in short you only get new maps and 2 new gadgets and you cant use the new unlocks (or rarely, as its disabled)
the unlocks are part of the patch not the expansion
if you want to get the unlocks on your account all you have to do is log in to your buddies (or Cybercafe
) SF and play 1 round with your account and you have your tear2 unlocks for ever with out actually having to install SF