These suck, just buy an e-bike they are awesome.

These would be great for many places that have storage restrictions on e-bikes, but not normal bikes. So you can easily detach and bring with you before storing it.

The idea of being able to quickly switch a bike back and forth between a regular one and an e-bike seems cool. They lost me at the "smart" though...

any particular one you recommend in usa

my costco has magnum melody

Pretty nice bike. I bought a Evelo with a belt drive and a automatic CVT transmission that is really nice to ride.