I can echo lots of what's already been posted. We recently flew from London to Sydney with Singapore Airlines in Premium Economy & I can't recommend them highly enough. First flight was just over 12 hours, 3 hours in the terminal then another 8 hours to Sydney. I'm early 60's but managed the time difference (11 hours) & was able to sleep, eat & be entertained the whole way. We've booked again with SA as we are travelling to Singapore later this year.