I bought Litchi for two reasons; The ability to pre-programme missions and the POI capability.
Both work fantastically well. I'm working on two projects currently; mapping the route of a canal (30 odd miles) from Lough Neagh to Carlingford Lough; and a study of a big oak tree that I'm orbiting every two weeks and stitching together to make a video clip of the changing of the four seasons.
Both are a doddle using Litch, but for ordinary flying I still prefer the Go app. On Saturday, I set the phantom off on a Litchi mission, furthest point was 2.5km away, go a quick rotate around, then curve smoothly back in to pick up the entry point of the canal. So off it goes, and gets out to the extreme point, does the wee circle and heads back. Great stuff, but then I got the warning 'SD card full, recording stopped'. Schoolboy error! Forgot to format the card before taking off. So I had to RTH and redo the mission. But it worked perfectly.
On one other section, I lost signal for about a minute as it went out of range / behind trees, but it just flew right back as programmed. No problem, but you do have to learn to trust the technology.