SAFETY FIRST: because the energy stored in the capacitors provides enough flight reserve for landing with the help of an electric motor, so you can enjoy the same safety like a twin-engined aircraft.
When you reach cruising altitude and speed, the main propeller stops. The sound comes from first a turbine operating at a constant and optimal load at the back of the ariplane, and secound from the folding propeller. As a result, the noise load is much lower for passengers and the environment as well.
BETTER OPERATION OPTION
This aircraft has tandem wings. These wings were designed to allow the aircraft to safely land and take off at lower speeds from smaller airports that we have so far had little or no use for business flights. The new generation of autopilots become better and better so this will also open the door to the proliferation of such new self-propelled aircrafts.