i fly on the 500, 3 to 4 times a month, however our longest flight is only 15hrs which is syd 2 dxb, also do a 14hr dxb 2 jfk with a 24hr layover which is a killer....nice aircraft however breaks as soon as you touch it, always going tech and ife system never works, crew rest is ok, downstairs at R4, so very noisy can hear carts, pax and toilets but have ife down there to block out it out