I love this game purely for it's multiplayer. The single player game I thought was pretty boring, but it's obviously been released as a mainly 'multiplayer' title.
The graphics and sound are superb! I find the range of vehicles available in multiplayer gives this game an edge over other multiplayer releases such as Unreal Tourney 2003. Plus, there are some recent mods out for the game, one of which is an Alpha release called Desertcombat (www.desertcombat.com) which upgrades the weapons to modern day technology.
This is one of the most fun games to play online that I have seen. Especially bailing out of a plane leaving your gunner to crash :)