Cabins on Celebrity ships very uniform. The 15 or so extra square feet in both the room and the balcony, especially the balcony over the Millenium class ships, make a big difference. Shower was too cramped for my liking and kept hitting my are on the shower door using the toilet. Level 11 is preferred over 12 in my view as you don't have the big overhang right above you. I was on port side near the rear. Was overall very quite, low foot traffic, no engine noise, no odd smells or sounds.