The game is really fun, and using boost power provides extra fun! The tracks have massive turns, ramps, and fascinating scenery. GX has some of the best graphics I've seen on the Gamecube, and the music is equally outstanding (I wear headphones while playing this game)! The story mode is tough as hell, but it adds more replay value to the game!
If you own a Gamecube and you are a fan of the Gamecube, then get this game!