It's worth it. About 12 hours ago I spent a lot of hard work doing it. I didn't think it was worth it, but it is. With the emulators and what not, I'm glad that I found it, with updates weekly, there's always something to do. Here is a few of the stuff I like:

GuitarsOnFire - You use Frets on Fire songs for these! You can use your Guitar Hero guitar for this too. I loved it, basically it was MY guitar hero. And it has customizable features, so basically it IS mine. I'm actually thinkin' about sellin' my GH games, I don't use them, and all the songs I DO want, I can get, so yeah, a VERY GOOD THING! =)

NES Emulator - I don't know what it's called, you know it's like NESxv9.1 or somethin', but me and my mom had fun reliving Donkey Kong Country and Super Mario All Stars!

WiiRadio - A radio with 1000 channels! From Russian Reggae, to Japanese Rock, it has everything! I love the anime channels and some of the metal, it's great cause if you don't like one channel you can switch to another, and so far I've found about 5 metal channels, and 3 anime ones, so I always have a song playing that I like. Music to code by =3

Well, that's all I've been able to test today, but it has tons of stuff. Games made by people, ports of some flash games, media players, loads of stuff! I totally recommend it. It put the fun back into my Wii! Thanks Nadrew for tellin' PerfectGoku about this, I'm so happy I found out about it!