This microphone works fine with Guitar Hero World Tour. A couple details on that:
- The microphone plugs into the back of the Wii, but you still need a Wii remote to be able to navigate the menus and adjust settings
- You can adjust how much your voice comes back out of your speakers by pressing the 1 and 2 buttons on your Wii remote. The range is from 0-10; I went with 0 since I don't sing so well.
- I recommend taking the training on vocals so you'll know how to initiate star power, etc.
I haven't used the official Guiter Hero microphone so I can't give a direct comparison, but this one seemed to work just fine for me.