Looks can be misleading. No doubt those little blue amps pump out some current, though I wonder if they are only at their best with proper toe in. Also, while they certainly take a step in a new direction, if I were the designer I would have started with golf shoes to take advantage of the built-in isolation. Lacking actual measurements, I can't say for sure, but I strongly suspect a set of cleats will sound better than a single spike heel by a significant margin. But then, of course, you'd take a hit on esthetics.
