The Wii is not known for having games look good on them, but this game definitely doesn't. The graphics are not very good at all. (I'm not picky about graphics, but the characters just look weird.)
The game itself though is fun, if you like High School Musical. You basically start off with just the music from the original and then unlock some from 2 and even some bonus songs. I think it is going to be hard to get some of the things unlocked. I do like how they show you what you need to do to unlock the different characters, outfits, places and songs. Some of the songs are going to take a decent amount of time to unlock since you need to have 100 million career score.