I only have Metroid Prime 3, but have played the other two and they're veeeery good.

Only problem with the Wii version is that you do literally have to spend the entire time that you're playing it with your wiimote pointing at the screen. I found the controls to be easier on the Wii though, the GC ones always confused me.

My bf said that it took him AND his brother on one controller to beat the final boss lol! Either it's really hard or they're both stupid! XP