Have flown on one only once, back in 2013. Flying from Paris back to Dubai on Qatar Airways. The trip was Paris De-Gaulle to Doha, and then on to Dubai after layover. I guess they had to get the big bird back to Dubai and used it for just that short hop. There was less than 100 on board and we had pick of our seats in economy. I sat all the way in the back so I could see the whole plane. It was brand new.