Wind blew at 8kts over water. The sensors could not hold location, turned to fly virtual back and rotation insued.
Very happy with quality. The form factor makes this drone compelling. Altitude and speed are not of great consequence. Look forward to the Tello 2 - hopefully with a better camera and mini sdcard slot. Would make the Spark irrelevant to most people’s photo-video applications. The price point makes and with further iterations - this drone is the class leader.
I have so much belief in Tello drone - selling the Mavic air. I will pick up Mavic mini when on sale to complement this one.