just finished upgrading everything to the new firmware. all 6 batteries the bird and the remote, ive never had an issue with any firmware upgrade since day 1 and I bought the day it released. ive always used the Supplied SD card for the updates. I also keep every single update stored on my PC. 144 flights without a hitch minus a few compass freakouts. The new App seems to be alot smoother also. Happy flying. See you guys in the skies.