Would work fine in Manhattan too as long as you stay off the FDR. That being said I don't get why they don't make it go up to 40mph. I can't imagine there's much market for this vehicle but I'd be thrilled to be wrong.
Vehicles like this one are usually targeted at young people that can't yet get a license for a standard car (usually you need to be 18 in EU), but can get a license for vehicles with max speed of 45km/h from ±15 (depending on country).