Despite the title, it was not even comfortable to begin with. But yes, I did sleep for at least half of the 8 hour journey.
Most of the LCD monitors were not working and there we were staring at the blank screen, with not even a flicker. No books or magazines were in offer (even the in flight magazine were not available at every seat). There were rubbish from previous flights not picked up from the seats' storage pockets. I cannot imagine when was the last time they vacuumed the place. Air sickness bags were not replenished and we had 2 passengers asking for them but the air stewardess were very slow to provide them.
The toilets were nit regularly checked and the paper bin was overflowed.
Food was terrible (badly served by rude stewardess, dinner rolls were almost stale, cakes were dry, vegetables were overcooked, rice for dinner was over-boiled and for breakfast was dry, no plain water was given with the package and tea was only served much later - one could choke!).
Group checking in was chaotic but thank God the immigration process were very efficient.
The flight crew could use with more smiles and more proficient English and/or Arabic. We were treated like beggars in that flight and this was not our first experience with Saudia but certainly the worst!