This morning I went to Fry's and bought a Wii Fit, protective cover, two packs of 8 rechargeable AA batteries, recharger, and another Wii Mote & Nunchuck. I then played it for well over an hour and a half (55+ minutes of active play time so far). My muscles want to kill me now. Regardless I'll probably play it some more on the new games I've already unlocked. I'm looking forward to when I can play the Zen game, heh.
PS: Yes, I hit 150 pounds. While the game says I have a normal BMI (under 22 actually), I still see a gut and I'm pretty far from a six pack now. 150 means it's time to start working on that.