One of the best multiplayer experiences and, as far as I know, the only to rely exclusively on the player's individual skill. There is no other way to win the match, just be better than the opponent. Easy to grasp, impossible to master.
The physics are top notch and the cars feel really good and easy to control. There is a bit of a learning curve but once the game clicks you can easily have fun no matter in which skill level you play.
The matches are about 5 minutes long so it's a really good option if you want something to play here and there for short bursts of time.
Also the customization options are pretty neat and more than enough for this game.
Check it out, it's free to play after all.