Yes. I go to Zumba classes and love them. I invested in the Zumba DVDs and found them too fast and some of the steps too complicated, but to be fair I didn't stick with them and passed them on to my sister.
I like the pace of the Wii version. Lots of the tracks and some parts of the routines are the same as my classes so some are very easy to follow. Sometimes it can be tricky to pick up a step or two due to the fact that the person you are following on screen is in silhouette (think 'Just Dance') but most of the time it is fine.
Give it a go. They shift well on ebay if you don't like it.
ooh, i have been to Zumba classes and loved it but am struggling to get childcare to go for the next few weeks (DH won't be able to be back in time for me to go). Didn't realise there was a Wii Game - thanks!