The one thing I don't like, and this may just be Emirates cabin configuration, but the space between the seat back and the cabin wall on the widow seat is too large to be able to rest your head "comfortably" against the wall to sleep.
I flew MEL DXB LON KEF a couple of weeks ago. First 2 flights were A380, and the last was 757. I got better sleep on that 4 hour flight than either the other 2 legs (13 and 8 hours).