I seem to recall that this is like a BIA for body fat percentage. The company claims that the device can measure muscle density or some measure of lean mass in a particular muscle. Apparently you use the data to enhance program design. It seems like a viable idea. But to me and most of my higher level clients, performance is a more important measure of what they want to know. As in reps/weight, vertical leap, 40 time, etc.
It is something that intrigues me, but I haven’t spent any time on really looking into it. And if I haven’t done the background research, I don’t consider buying something.