Flown in it a couple of times, and the height of the body makes the walls of the cabin seem far less 'tube' like and more spacious, very comfortable and quiet. OTOH the 747 felt like an ergonomic slum in comparison.
Fly First Class in the nose of a 747 and there is nothing in front of you like say a galley or toilets or even other people if you get the front seats. Therefore it is a much more peaceful and quieter cabin as a result. I've also done First Class on the A380 and there were far more people walking down the aisle from the front because the flight deck, the forward stairs and the toilets were all beyond the cabin.