Still fun but it's the same game then the others.
The new thing with the game is that most games are controlled with the Wii Motion controller (no need of the nunchuck to play it). You use the inclinasion to move kart, or point the screen to shoot ghosts or to decorate a cake. However many of the mini games are only to shake the controller the faster you can, it's fun for the soda can mini game, but too many mini games like that makes it repetitive.
As previous game you can unlock many things. Each time you play it gives you "money" you can use to buy more mini games, figurines (Which is like Smash Bros' trophy , so if you like collection you might want to go and unlocked them all), you can unlock the music. If you play the battledome you can unlock 2 other characters you can use to play with.
Good:
Graphics look good
Funny multiplayer game, which can make you look silly and bring some good laugh time.
Competitive
Good for all age, gamer and non gamer
Bad:
Buggy sometime.
If you're many playing it's hard to all have a good spot in front the sensor bar which can get frustrating sometime because you're losing, because the sensor doesn't detect your controller.
No real innovation on the previous one, but good one to get to know the Wii's controller.
It's more an hazard game than a skill game. If you win all the mini games you can still lose because you're unlucky on dice or candies or star bonus if you let it turns on.