My son is a huge Disney Cars fan so we have this game for the Wii, Disney Cars (not Mater National) for the PS2 and 2 Disney Cars games for the Nintendo DS and to be perfectly honest there is not much difference between the game for the PS2 to that for the Wii.
We find this game to be child friendly and easy to use and nagivate around the different menus.
The usual format applies as to that of all Disney Cars games that you race different characters to unlock new mini-games and races.
My son does prefer to play the Wii game rather than the PS2 edition but this is more to do with the controls than the actual game itself as I mentioned there is not much difference.
The game can provide hours of entertainment racing against each other and is fun family entertainment.
All in all if you don't have PS2 Disney Cars game and are looking to purchase a Cars racing game I would favour this one over the other.