No knowledge or experience with them.
Assuming, and you know about assume, that the recharge part is the limitation, service and warranty?, heavy, limited range, reliability long term unknown from Chinese motors.
Great concept, just like electric cars. But the price for utility aspect? I'm not sold but would love it as a toy. Pedal still the way to go in my cost effective, efficient perspective. They usually only have a 20 mile range which is about reasonable for a pedal bike as well. Motorcycle is way more useful and yet that is still a toy except where short commute in great weather is the goal. That depends upon how you justify your expenses.... Up to you on that but think alot of these will become dust collectors, like bicycles and motorcycles for most. What had been your post experience with your bicycles?