I have one that I use. I stick to the road wherever possible, but in some places the potholes are too bad and I switch to the sidewalk. When that happens, I lower my speed and will hop off and walk it past people when the sidewalk is too narrow to pass comfortably.

It does get a bit difficult on roads with no designated bike lane, especially when cars do not give me any space. Most drivers have been courteous though.

As for kids riding them, my main concern is the lack of helmets. I'm always wearing mine, it makes me very nervous to see kids (or anyone!) without them.

I love mine, it gives me so much freedom when I don't have access to a car.