Poorly. The electric motor is straining and you’re going at a walking pace so there’s no benefit compared to walking. It’s on flat stretches where you save time, averaging 10-15 mph if you riding on a bike lane. I usually fold and shoulder the scooter and walk if I have to go uphill.
Of course, there are more powerful ones that can easily handle hills but they’re not foldable and they’re basically motor scooters without the seat.
But for moving around town even with a medium sized backpack strapped across your back (gym stuff, a laptop or even some groceries) it’s fantastic.
Also, the older I get the more I like going around on bikes. Not “biking” as in hunched over some road monstrosity in a lycra suit but simply doing one’s business and commuting to work. I guess subconsciously it has to do with cumulative wear and tear on the joints, even if there’s no pain.
I see that many senior citizens who dabbled in weightlifting such as these two in their later years became big proponents of riding bikes around.