That is soooooo cool.....I WILL get me one of those for Christmas, to me from Santa....that's way better than the GoPro (well, for certain instances) 
You're going to see those issues with most FPV Drones anyway, the major win for us PWC people is the fact that it is water proof. Most drones have completely exposed electronics.Looks cool but I see some negatives.
How fast can Lily fly?
Max speed: 25 mph/40 km/h (software limited)
How do you figure that Lily lasts 20 minutes? What constitutes normal usage?
This is at an average speed of 15mph. Flight time will vary between 18 minutes and 22 minutes, depending on how you use it.
How much time does it take to recharge Lily’s battery?
2 hours for a full-charge.
So it looks like only filming donuts and tailstands for 20 minutes then a 2 hour charge.
I'll pre order one.. i just watched a video of a tripod that can mount a camera and follows the tracker.. with zoom features on the right cams even.. it was great. this is better. I wonder how it would do above the sea doo following it around though, it seems awesome!Want.