The big deal for me with allowing LITCHI to handle corners is that it does not slow down much. I always make sure this feature is set for each waypoint. It makes a long range flight more efficient and much smoother. Most of the time, when flying with the curves, my missions completes about 15% earlier than what the Litchi mission time estimate projects. Without these curved waypoint transitions enabled, the bird will stop, turn and re-accelerate to the next waypoint....not so efficient...and very robotic. From my experience, the curve shown on the Litchi map is almost a perfect representation of the flight path...I would say within a 10-15 lateral corridor. It's quite impressive how accurately it flys the depicted mission. It's a great app for me, but others that are serious photographers might not agree. For me it's about reliable and repeatable performance even if signal is lost for lengthy periods. I know my boomerang is going to come home exactly the way I instructed it....not via an RTH which might take it over a playground, crowded venue, or God knows where.