Eh...it's alright...
To be honest, the game isn't embarrassingly bad, but it's lacking. The vehicle missions are pretty cool, but the gameplay is pretty repetitive, because all you usually do is shoot everything that comes in your way. Admittedly, this can often be fun in some games, but this isn't really one of them.
The game overall feels really dated, although the graphics are pretty good for a 2002 title. It feels almost like you're playing an old-school shoot 'em up with 3D graphics. The multiplayer can sometimes be fun, but it isn't anything to get hyped over. The storyline focuses well on the Star Wars franchise, but that's about the only part of the game that shines greatly.
The game does have its good points, though, like the multiplayer, but it isn't enough to save it from being a must-play. Overall, unless you are a hardcore Star Wars fan, then this game is best avoided. If you love Star Wars, then don't hesitate. But, the game is okay if you aren't hardcore about Star Wars, so it's worth renting, but not much more.