My family along with SIL family each had a secret porthole cabin last Labor Day week on the Magic. I unfortunately had 5522 which is a connecting room and it had more than its share of noise. We could hear the tub being filled with water and spashing- what they ordered from room service, their DD crying at 12 or 1 every morning, their pager going off- you get the drift! We were also across from the baggage handling room and we heard the metal door slamming quite often!
Anyway- to get to the point- I met this couple at lunch at Parrot one afternoon and found out that on the day of the cruise they were given an upgrade to this room! My SIL and I had originally requested these rooms and told they were booked (as in NOT AVAILABLE!)
I would steer clear of the adjoining rooms unless you have someone you know next door!
BTW- this was our 3rd cruise and we had never had noise problems before!