Normal
We were in the aft cabins two weeks ago. We were a group of eight family members occupying four of the aft cabins. My two daughters were in #8231 and 8233 while we were at the other end in 8222. They mentioned that on two or three of the evenings they could hear noise from the Crystal room below but it usually ended by midnight. Nothing major and didn't interfere with trying to sleep if they wanted. In any event it is a small price to pay for being in one of these cabins. They are wonderful, quite large (210 sq. ft.) and have plenty of closet space. In addition the small deck just outside is never used and becomes a nice balcony for you. Stairs from here go straight up to the buffet area. Enjoy.