You can read the MDR menus in the concierge lounge. One of the hosts/hostesses will take your order. Food will arrive after seating has begun in the MDRs. The written rule is that everyone must order from the same MDR. No Palo.
Be sure to order hot breakfast from room service. You can do this every morning except for when you arrive back at Port Canaveral. That morning you can have hot beverages, juices, milk, fresh fruits, danish, cold cereals, stuff like that.
We tipped after every meal, service was fantastic! There is no charge for included items from room service. There are items that had additional costs, such as candy, alcoholic beverages, popcorn.
You have to enjoy breakfast on the verandah, the view is best on your sea day. 12000 is our favorite stateroom, so much so, that we have it B2B in September.