DBZ didn't deliver that much!!
Personally for me the Wii console is to be play with the Remote and Nunchuk, I enter the training and spend a lot of time practicing over and over again and still was not able to make all of the basic hand combat techniques there way to complicated and hard to manage, also signature moves and blast attacks take a little to performed ones you make the move to released it.
I'm glad to have this game in my collection because I love the series but what comes down to playing it I think it will pass a little while until I completely control everything and each move from the characters in the game, but as I said before, maybe for me it's hard but for other can be more easier.