Honestly, seeing them zipping around everywhere they look pretty good on the face of it. The advantages seem obvious:
- Save time versus walking
- Quiet
- No effect on local air quality
The main issue is them colliding with pedestrians, but (similar to bike lanes) that's a thing town planners should deal with by creating the right environment.
I'm willing to change my view if people tell me good reasons they are bad.
Yes, there is more environmental impact than a bicycle, but not than an e-bike, and they seem to be good for people reluctant to cycle.
As a strict walker and train rider it has the same problem as any individual human operated vehicle where they all seem to want to kill me for daring to walk. I've seen people go on them very quickly on pavements without slowing down for pedestrians at all. In an ideal world they'd be great but honestly i think personal transport and people don't go so well together. More buses, trams and trains pls or at least less cars so electric bikes and scooters can go on the road instead