re location of 7544:
We had a similarly located cabin last November -- 6530. We were waitlisted for a Category 6 and were informed by mail of the cabin assignment. I am a light sleeper and knew the location would be a problem. I repeatedly called the cruise line reservations people to ask for a change, but it didn't happen. Sure enough, we found it quite noisy and would never book another cabin that close to the elevators/stairs.
Our next two cruises were booked through a travel agent agent who, on her own, refused to accept a cabin in that location. She was able to get us cabins mid-way between elevator lobbies.
The noisy location didn't ruin the trip, but I could have used a lot more sleep!!
Karen