I'm interested in a guitar for my Wii. I've played at friends before and i intend to get my own.

1) Anyone know how much is a standalone Wii guitar? (good as second player guitar)
2) is there original or alternatives?
3) can guitar play both GH and Rock Band? i heard from someone claiming they are not compatible. True?

For the full band set, the mic comes with it.

I haven't tried it yet, but i read somewhere that you can play with only the wiimote in the freestyle section. However you can't play it anywhere else with just the wiimote alone. Therefore, to me what it means is it is really no fun to play with just the wiimote alone. A minimum of at least one of the guitar/drum/mic controller is a must to play. I only have the guitar controller so far, and it makes a whole lot of difference!!! so i strongly won't recommend playing with just the wiimote alone.