This game was a really great game. I have the Wii version and played the PS3 version at my cousin's house. To be completely honest I liked the PS3 version better. It sort of seemed like sonic generations in boosting and control of Gameplay. The Wii version though... you had to shake the Wii remote to boost unless you had a classic controller or Gamecube controller. (In which i have both) The story was great but the worlds were stereotypical. I would recommend both versions of the game to buy.
Sonic Unleashed is definitly the best game of Sonic ever made