I've just spent 3 weeks kiting in Madagascar, where i obviously brought the Mavic.
Now, the wind for 2 weeks was blowing in the 45kn range, and obviously i didn't even think to take it out in those extreme conditions, i was having a hard time myself surviving that type of wind...
Finally we got a week of more relaxed wind, in the 25-30kn range (which, believe me, is a lot when you are in the water, when you miss a trick you really risk hurting yourself) , and i decided to take it out, fully knowing that it was very, very risky. The results:
1- Overall it performed wonderfully.
2- You have to fly it in Sports mode, forget about flying it normally. Without sports mode it would drift away in a heartbeat.
3- I was smart enough to ALWAYS take off downwind and send it upwind to film, the rationale is obvious: it will always be possible (and very, very fast) to fly back downwind, while you'll never know if and in how much time you'll be able to fly back upwind.
4- It was obviously quite tough to keep up with the kite, upwind speed was understandably very, very low.
5- I naturally could only film my wife, who is a relaxed beginner, and for obvious reasons couldn't have the Mavic film myself...i so wish for DJI to enter in the sports market with a tracker.
I haven't yet worked on the original footage but just did a quick edit in the app for my wife (exceptional app BTW), link is below. Please bear in mind that i'm a beginner drone pilot, i have a total of 4h experience.
I think in the hand of a serious pilot with a serious kiteboarder this thing could really make for some uber cool footage.