Current launch costs into low Earth orbit are ~2-5,000 USD per kilogram (using a cost-effective bulk launcher such as SpaceX’s Falcon 9). Since the cost of launching anything is so high, making sure that every kilo launched is used as efficiently as possible is crucial. Electric propulsion systems such as ours are several times more mass-efficient than chemical thrusters, which means that less propellant mass is needed for the same mission, either reducing launch costs for ride shares or enabling more a greater share of the spacecraft mass to be devoted to mission payloads. While a chemical thruster enables more rapid orbit transfers, the greater efficiency of electric propulsion can result in much more cost-effective missions.