Well folks here goes my tale of woe...So some of you may recognize that I have had problems with a brand new TH Pro since day 1. Set it up did not hold position, behaved erratically, scary to fly. Sent back to Yuneec. Came back with GPS Module replacement. No real change, still scary to fly. Updated to 9/1 firmware thinking maybe they fixed some stuff, nope still flew bad. Updated to 9/13 firmware figuring they fixed things. Flew today after carefully calibrating everything. Now I get Compass error message (did not before), Drifts, wont hold position well. Jerky response to sticks in turtle mode. Doesn't like to descend, had to go to rabbit mode to get it to come down. Scary landing, wants to keep throttling up. turned off motors. then unit would not get GPS lock and go into ready mode. Had to power cycle ST16 to get to ready state again. Called Yuneec, this time they made me send in flight logs. Response from them was a canned response about calibrating saying that logs revealed compass errors. Really? So I responded to them with my dissatisfaction. Now I have 2 THs both have been to yuneec for repair. The TH flies great after repair. The THPro is still poop. $3500 bucks, 2 months, and I still cannot fly. Oh and BTW, the TH is far less solid after the 9/1 firmware update, I will add the 9/13 and see if that fixes that one.