The range on the transmitter/controller is only 980 feet, and if it wanders out of range it will "return to home" for you (I haven't tested that feature yet).
They are a lot of fun, but I can definitely foresee a problem with them in congested cities.
“The range on the transmitter/controller is only 980 feet, and if it wanders out of range it will ‘return to home’ for you (I haven’t tested that feature yet).”
Hmmm...Cops say they were at 2000 feet and needed to take evasive action. I suppose Youtube will quickly reveal what folks are able to do with the DJI Phantom II outside the “official” specs! (as usual).