I have flappy-paddles in the MB-AMG and use them all the time. It actually improves the car...
It has a choice of "Comfort", "Sport", "Sport +" and "RACE" engine modes. Comfort just dumps you in the highest gear as soon as possible, and is slow to change down when needed, often doing a jerky double downshift.
Sport & Sport+ have change-points much higher up the rev range, which you seldom need for road driving. But using the paddles to short shift up, whilst retaining an engine map which gives quicker downshifts, is the best of both worlds; a nice engine response and surprisingly good economy - as good as Comfort for economy. (RACE is bonkers and gives very harsh changes - never use it).
