If you're a Mario Party fan then you'll like this game. New Wii controls a cool addition.
The Wii brings a lot of room for new gameplay to the table and Mario Party 8 takes full advantage. The story's main character isn't anything to memorable but i guess it's better than just Bowser again. Although if Bowser's not the boss/bad guy this time it would've been cool to have Bowser as a playable. Regardless of what anyone says about Wario...Bowser is still the best bad guy Mario has and playing as Bowser would have been fun. He doesn't play a significant role in this game so making him playable would be my only suggestion.
Other than that all the elements that make you either hate or love Mario Party are here...from the chance heavy element to the way the game seems to set up the losers to be winners at the end.
If you like party games or are a Mario Party fan and have a Wii you should pick this game up.