I'm not just talking graphics and sound, but overall gameplay, and game structure. This is probably the game I have played the most so far on the system, and unlike Tony Hawk, I've actually felt compelled to solve the game through with multiple characters. Everything about the game shows a lot of thought and time was put into making this game right. Playcontrol is just right, and with a bit of practice you'll find yourself pulling off some pretty nice moves. Play it long enough to build up a character, and you can do some pretty amazing stunts.
Graphics are fantastic, and definitely set the bar for other games to compete against.
Lots of large open, bright spaces. Lot's of detail on the characters and environments. A very nice frame rate with hardly any noticeable slow-down. The audio is impressive as well. Not only are the sound effects really well done, but the music is extremely well produced.