I can garuntee that no one will say anything positive about its graphics.
I heard a lot of people generally mention these 2 issues with the game. . .
1. It is a easy mario game, thanks to AI and being designed for poor teams (people who do not work well together).
2. It is a pain in the wrist, really as apparently you have to wildly flay the wii mote around to do basic actions like pick up and stuff. This is viewed as a back evolution from button based control scheem of others.