well... I hope you have not booked your ticket for 11th deck yet!!!!
I am a crew member for Norwegian Jewel, and I work at reception, So I hear everything people complain about, if you look at the layout of the ship...the gym is on deck 12!! so if you are in a cabin below the deck, if you are a light sleeper, you will get woken up by the tread mills every morning at 6am! we have tried to fix the problem by turning off the machines above the complaining rooms, but they always seem to turn them back on, and people complain of the machines being turned off. So i highly suggest, if you would like to get deck 11, make sure you are not below the gym!! every single week we had calls about it, they were not very smart when building the ship!