Quick impressions
Did 45 minutes of ingame clock today, about one hour total with the menus, maps etc.
Intense level 20.
I am 38-year old, tad overweight but in physically good condition.
This is a real deal. I got to the second world and already there doing some of the battles consecutively was pretty good workout. You can absolutely break a sweat on this thing even if you are in a good condition. It's incredibly responsive and even though there are situations where you could cheat the game quite easily... well you can do that alone at the gym too.
Overall. I won't change anything else in my daily life, but will add 30-45 minutes of this and it'll be interesting to see the results for instance by the end of the year.
Nintendo has a knack of moving people. I want more games on this world, more events, sports, things to do. I want compatibility with the Wii Fit Board and everything else.