I bought Litchi last week and so far I love it.It is expensive (25 euros) but worth the money. I executed 3 missions in the countryside and they went flawlessly. I'm experimenting with gimbal pitch now and I prefer "interpolate" than "focus POI" because with "interpolate" I can control the angle completely. Sometimes, I have to adjust the "curve size" at curtain waypoints in order to make journey smoother. Also, I found out that a 10 minutes mission on the hub lasts about 8 in reality. So far, ground elevation calculated with Google maps seems accurate.No more remarks for now.