They all have integrated bathrooms fitted into the ship during construction. Older ships had more spacious cabins because there were more days at sea, fewer ports of call and fewer entertainment rooms. This encouraged many to spend a great deal of time in their cabins, often entertaining other passengers. An outside cabin is recommended for first-time passengers as inside cabins have no portholes or windows, making it more difficult to orient you or gauge the weather or time. Cabins located in the center of the ship are more stable and tend to be noise and vibration free.
Ships powered by diesel engines create and transmit some vibration, especially at the stern.
Take into account personal habits when choosing the location of your cabin. For example, if you like to go to bed early, avoid a cabin close to the disco. If you have trouble walking, choose a cabin close to the elevator. Generally, the higher the deck, the higher the cabin price, and the better the service. This is an inheritance from transoceanic times, when upper-deck cabins and suites were sunnier and warmer.