This game is SO disappointing. My wife & I were both really looking forward to playing this on the Kinect. We love Zumba. Had this been even an average game, we would have loved it, but the truth is that this is a badly designed and barely usable product that gave us nothing but frustration. Unintuitive user interface when navigating the menus is bad enough, but it's when you play the game, and find that it chooses to either totally ignore you, or it tells you how fantastic you are doing, even after you've stormed out of the room in frustration. The random login screen was a constant intrusion, and in most cases you are stuck at this point, because the kinect stops responding to your input.
The developers should be ashamed of themselves, and the Zumba company should actually be quite concerned about attaching its name to this. This damages their brand, and will certainly make me think twice about buying anything like this again. No matter how much you love Zumba, do not buy this product.