Got this game this morning as I've wanted to try Zumba for a while, but shift work means I have little time to attend a class. I did 2 tutorials and the beginner routines 1 and 2. This took around 50 minutes, and the sweat was pouring off me by the end! Gross I know, but just goes to show how well this Zumba workout gets you moving.
I am a complete beginner, and got a bit tangled up with some moves, but I've never done it before, so it can only get better.
Although the interface looks similar to Just Dance and Just Dance 2, I found it miles better. Zumba Fitness rewards your effort, not just when you get the moves EXACTLY right. So if you get stuck, you can always keep moving to the beat and catch up when you're ready. This allows you to continue working out without just staring blankly at the screen when a move is slightly on the hard side. The classes are also split into little 3-5 min sections so you get a bit of a breather and a change of music and routine.
The only fault I could find is that it would be nice if it gave some information about calories burned etc after a workout, but thats just a minor niggle! You know you're burning them off, you can really feel it.
Definitely a must have addition to the Wii fitness collection.