People report engine noise and vibrations in the cabins that are aft on Deck 1 and 2, but some like the vibrations as they feel it lulls them to sleep. We have always been mid-ship on either Deck 1 or 2 and never experienced a noise problem.
Well, except for the drunk guy across the hall who threatened his female companion. Yes, we called security and they took care of him right away and put him someplace else for the rest of the cruise (was not his first outburst that cruise).
MJ