Sonic Riders is the perfect blend between the exciting story and a great racing competition. The grade here is too low.
The story itself isn't hard at all (except the Sky Road track), but the mission mode will require some skill, besides of the play time spent to unlock all the characters.
If you're like me, a huge Babylon Rogues fan, the Story is worth playing again and again just to watch the cutscenes. The only reason for me not to give it a 10 is that the game itself is too short. It is worth playing and adding to your collection.