I have been flying electrics for 6 years and I have never had a BEC fail causing a crash. I have built and flown everything from motor gliders to.60 sized warplanes. The nice thing about using a BEC with auto shut off is that your flight day is not limited by the charge in the RX battery like it is in a glo plane or an electric with a seperate battery pack on board and no BEC. This is my opinion..others may disagree.