Very hard but rewarding, Sonic Riders seeks to provide a challenge to people bored with everything else.
The graphics are pretty average, basically SEGA's usual very cartoony style, similar to Shadow the Hedgehog and Sonic Heroes. All the characters have head their designs slightly modernised though which is pretty cool.
There's a lot to this game, plenty of modes, a pretty decent number of tracks and plenty of characters. The story mode is quite short and uneventful, nothing as epic as Sonic Adventure 2 for example, but it's a fun distraction, it seems short but you'll hardly ever beat a level in less than 2 or 3 goes.
Overall the game is pulse pounding and exciting, but also incredibly frustrating and hard to get into unless it's given a chance. However learning to play is a rewarding experience since it's so hard. Really this is for fans of Sonic or those looking for something new, it gains bonus points with me entirely because it's a Sonic game. It's worth trying it out before you buy it.