The controller’s monitor (or even the DJI Fly cellular app) does a good work of indicating hazards when you navigate limited spaces, rendering it easy to steer accordingly. Like other Chinese manufacturers, DJI has come under scrutiny from the US federal government and security scientists with regards to stability problems. https://manuelwhafl.myparisblog.com/28602111/how-much-you-need-to-expect-you-ll-pay-for-a-good-jet-power-generator