Contrast the design and price with the electric unicycles like Solowheel, Airwheel, Rockwheel and various knockoffs that have been around a while. I got a Uni-wheel [1] for $300 last month and it's pretty fun to ride. The specs for the weight, top speed, and run time are pretty similar.

[1] https://www.youtube.com/watch?v=sF17hVc_VaM