We stayed in conn. cabins 2122/2124 - 2138/2140. We loved the smooth sailing on Cat 9 on Deck 2 w/ the large porthole windows!! Just a hop and skip from elevators, very convenient to restaurants and lower deck makes for easy exit at ports. We surprisingly found the rooms and halls to be relative quite. Rm. 2124 did have some noise above after dinner during evening and 2138/40 some humming from motor - but nothing that would stop us from using again.
Don't stress, go and have fun!! After a great day of cruising fun, by the time you hit the sack you are so tired you won't hear a thing... LOL!!
~ Sandie