"I never lock my Brompton. I just fold it and carry it with me. I have several bikes, and at 24 lbs my Brompton is the lightest bike I've got! I take it in its sack on the Long Island Railroad and everybody assumes its just a large soft-sided attache case. The bike is quite nimble but is not the fastest two wheeler on the street. I wouldn't want to ride it to Chicago but its great for errands around town and the trip between Penn Station and Wall Street or for a leisurely trip from my home on Long Island to anywhere within 25 miles or so."
The suspension works, but there isn’t any true dampening. That means you’re just riding around on springs. On a real full suspension e-bike (i.e. a few thousand dollars) you get actual oil-dampened shocks. Those absorb bumps and dampen the shock. With springs, the bike bounces a few times after bumps, with the energy dissipating through the spring stretching and compressing.