No complaints. There is a storage room adjacent, but we only heard noise form the room twice. The cabin is very convenient to the forward elevators and we didn't experience any noise issues from that. The only issue of note is that debarkation at ports and on the last day crowds the hallways and stairs right outside the room. The noise at those times can be a bit much, but I would think is only a problem if you're trying to sleep in. It really didn't bother us.
R16, Twin Portholes
Our teen sons stayed in this room. It was very quiet, clean, ample space. No issues.