From an aircraft design perspective, it is an interesting choice. I can't help think that this design, with dedicated lift engines is just not very mass effici

From an aircraft design perspective, it is an interesting choice. I can't help think that this design, with dedicated lift engines is just not very mass efficient. The pylons and the twelve motors also add a lot of drag in horizontal flight, even though they've taken steps to reduce it. As of today, if I was designing an air taxi from scratch, I'd go with a tail-sitting VTOL, like the E-flite X-VERT: https://www.youtube.com/watch?v=wFXibbgNix8 https://www.youtube.com/watch?v=wFXibbgNix8 For a full-sized aircraft, since you can't vary rotor speed very quickly for large motors, you'd need to add variable pitch propellers. The passengers would sit in a pod which rotates to keep them level during all flight modes. And, as other commenters have mentioned, a ballisticly-deployed parachute for safety. And maybe emergency landing skids for a horizontal landing if needed. I know that electric flight is part of the selling point of this design, but I'd still prefer to use fossil fuel for the energy density. I'd love to try it out if it goes into production!