Wii Fit Plus - Hit or Miss?

[Khuutra]

Zlejedi said:
[WII] Wii Fit Plus (Nintendo) - SA 108,000 (42%) / BB 9,300 (16%)

first day in Japan.

Seems rather low for 3,5M wii fits in Japan and might be below Wii Fit first week.

Considering it's more of a continuation of Wii Fit rather than a whole new piece of software, I would expect sales of one to transfer seamlessly into the other.