Too much reliance on automation often leads to complacency. Probably 90-95% of the time, FBW does what it is supposed to do...emotion is taken out of the equation and the aircraft is flown following very specific laws. That 5-10% though is what is worrying. Thats when 'bad things' happen ( I didnt say 'accident' because in many cases the end result could have been avoided ) - Pilots find themselves in a unfamiliar situation...decisions needs to be made very quickly....emotion enters the equation...and the rest is history. Appropriate training and discipline are crucial in our world of man-machine interfaces.