Bought the Amazon success story (they probz stole it from an aff) X300C drone by Simrex (haven't checked them out yet, probz and Amazon subsidiary). Great fun, easy set up, blah.
In my searches on calibration problems i came upon this lovely, English-isn't-my-first-language review :
http://photographydrones-net.tk/simrex-x300c-mini-drone-fast-little-drone/
I hear airports are great for good photos :-)
And active fire areas (https://www.google.com/search?q=drone+grounds+firefighting+aircraft).
Based upon previous responses, this broadcast has now been cancelled due to electro-magnetic waves, or particles, i'm not sure - let me ask my cat, where is (s)he(IT)!?
Bloody thing got sent with blades in wrong position and double-wrong replacements.
Ordered some A/B blades now, based on shaft diameter since there's no Europea supplier. Moan blh.