I have yet to fly in way-points mode. I want to fly in way point mode and save as favorite. Then I want to revisit this favorite at another time of day. SO my first flight might be dawn, 2nd flight might be mid day, and 3rd flight might be dusk. How accurate is the way points favorite. I want to ge able to edit in post and make it look like one flight.
Does that make sense?
p3s
2.7 video

"How accurate is the way points "
As accurate as consumer GPS.
That means your waypoint flight will be close to the original but each point could be 1-2 metres out and possibly more.
Don't rely on waypoints close to obstacles.