The major thing I'd be worried about (if I was an investor) is the promise of collision prevention. Look at the major competitors and all have steered away from promising this, why?
More expensive drones don't promise this, why?
The answer is the technologies are not reliable enough yet for the obstacles drones are likely to encounter (i.e. other drones) and the 3-dimension flight space they have to work with is hard to program this in also.
Car obstacle collision is 2d and doesn't have to be nearly as accurate as drone systems and yet it only really came in 2015 and is still causing headaches in the self-driving car industry (although getting better every day).
It's certainly possible, but they need it ready today. Not sure if they have over-promised on that one.
IOT Price at posting:
9.7¢ Sentiment: None Disclosure: Not Held