Cue Benny Hill music and footage from the mad Inspire chasing you round a field trying to land on the controller or turn you into a version of Inspire Blender
I was pretty impressed with the standard RTH accuracy when I tried it out a couple of days ago - the I2 was within a foot of it's take of position coming back from 400ft up and 1600ft out.
I have used mine to land on a speed boat. In RTH mode it was coming down from 60m and because we are moving it tracked me and landed on the boat within 2 feet of the takeoff point. We didn't slow down the boat and all on board went crazy when they saw it. All i can say is well done DJI...