ok, i saw it.. my experience?
it's definitely not a good movie, and it seemed to be completely oblivious to the anime, since it didn't follow the facts put down at all.. i dont want to spoil here, but believe me, its bad.
i mean, grandpa Gohan is alive when Goku is a teen! Goku killed him when he was a kid! oh, also, if you're expecting a impressing Oozaru, be prepared to be disappointed.
as for the actor casting.. let me just say, i dont know what the director was thinking.. especially the actor playing Yamcha was Horrible with a capital H.. it was so increddibly obviously over-acted that i couldnt help but being annoyed by him.
all the characters are acting pretty obviously, except for maybe Chow Yun Fat, the actor for master roshi who lives in a, in this movie, extremely lame looking kame house.
bottom line, if you intend on seeing a good movie, avoid this!