ZUMBA on the Wii- Success??? Tips???

I bought Zumba 2 for the Wii yesterday. Did a full legth class ( 1 hour) said I burned about 644 calories, which is about what my heart rate monitor said. So that was exciting.
Since it's only day one for me, I am curious to find out if anyone out there has had success with it? Or has any tips?

Thanks,