"Holding altitude is extremely easy with minimal throttle modulation required."
A $400 DJI drone from Costco or Bestbuy will hold altitude automatically, and its position, by simply letting go of the sticks. A $100 Naza M lite flight controller, w/gps, from DJI had the same capability... 6 years ago.
Youre absolutely delusional if you think their drones are anything more than a massive ripoff, likely part of a larger scam.