I would never recommend the A seat in the 744 front exit row economy, and especially making a half hammock out of the blanket tied around the grab handle on the wall of the aircraft (not the door). This lifting of the feet can reduce the blood pressure and enable better sleep.
The reason that I would not recommend it is because I have spent many hours moulding the exit row seat on Wunala Dreaming to the shape of my backside.