I watched all the videos they have on the device. They claim it helps with Latin as well since the device is aimed at helping you with your frame, but it looks like you would be limited in movement if you tried to dance with it on. But, for smooth/standard dancing, it looks really useful (that's my weak area anyway).

An instructor at my studio warned me that it still won't help with proper posture. In the video, one of the guys mentions demonstrating it at the Ohio Star Ball. I live in Columbus, so I think I'll have to check out the vendor when they roll into town next month. It's kind of pricey at $125, considering it's just a bunch of metal tubes. I realize a lot of research and testing probably went into it, though.