I guess I'm just an old coot...Totally
Missing The Point. WHAT IS the point for having one of these..?? It's not Fast...Maybe a little faster than walking...not so much jogging..BUT I thought walking was Good Physical Exercise.
IF.... it's just a new TOY that will draw attention to
YOURSELF..Then...I guess it works.....

NB
EDIT: I applaud the inventor for his engineering curiosity to TRY this.