IMHO, it’s a great invention. There are millions of people who need mobility devices, for a variety of health reasons. This unicycle will suffice for many people, and is a lot more compact than an electric scooter.
Attention Walmart Shoppers...
I've seen Segways in use at factories, and by airport FBO line crews.
The Segway is nowhere near as pervasive as Kaman thought it would be.