Flew over 1,500 acres the past two days using DD ver. 4.11.0. Mainly mapping (NADIR), which went mostly well. On a few occasions where I had a lack of cell coverage, the app took forever to start up and I tried restarting several times before it kicked in. Once upon take off it just hovered at 4 feet AGL, but restarted mission and it took off normally.
All in all a good experience, 21 TO/L, and keeping my missions simple since it is a lot of ground to cover.
iPad Mini 5.