Thanks for the quick replies, u are obviously a valued member to this community!Accuracy totally depends on VPS but in an outdoor scenario you will never get the tolerance anywhere near what you are expecting, and Tello does not land on its own. I am happy if Tello comes back to within 5m. But on a long range trip its OK if Tello returns into the right direction and comes close enough for me to take over using LOS.
If you have expectations for landing on a pad AFAIK only DJI drones mix their GOS with downfacing camera to achieve "precision landing". But: take away the landing pad so their visual reference is gone and they will land within a few meters just like any GPS drone.