Whilst 'Full Auto' is, at times, repitious, the gameplay stays pretty solid in both the single and multiplayer.
Full Auto's learning curve is pretty good, gradually introducing the player to new weapon-sets and vehicle types (ranging from speedy to heavy, differing on armour, handling and speed). Although at first the game's seemingly shallow nature may make playing the 'career' seem like a daunting chore the game actually becomes more fun as you have access to more weapon sets and the ability to 'tune' them (which means basically choosing whether the primary or secondary weapon is better or whether they are equal).
Once you've beaten the 'career' mode, which involves racing in different categories that try to stick to a particular theme, the only real incentive to go back and do it again is if you haven't got 'Full Auto' (which is the equivalent of 'Gold' in most racing games) medals for all the races. Although the races generally require you to come first to move onto the next race, the medal you receive more often than not depends on the amount of points you rack up during the race. You gain points from destroying things - anything from the environment to the other cars (which naturally respawn not long after).
Destruction also adds to your 'unwreck' meter which, when used, allows you to reverse time so that you can attempt another corner, jump, kill or similar that you may have messed up. This, alongside the boost (which is added to by drifting and being in the air) are the two things that keep Full Auto interesting besides the weapons and destructable environments. Obviously the unwreck is cut out of multiplayer, but the multiplayer still stays strong due to 'Full Auto''s competitive nature.
Split-screen multiplayer is sometimes hard to come by, as are bots within multiplayer these days, but 'Full Auto' has a decent customisation system for choosing the track, vehicles, enemy AI and such like which means that you can play the best parts of the game whenever you like.
The soundtrack isn't anything special, but the music and sounds are sufficient to give the impression of speed, aggression and destruction. Even if you aren't a fan of racing games, 'Full Auto' is definitely worth checking out thanks to it's strong, competitive gameplay.