Seems you had an OK cruise but I just want to point out some things that may help you understand a bit better. It is not uncommon for mechanical issues to occur as did with your air conditioning especially on a ship that is 18 years old. The announcements are not broadcast in the cabins as to not inconvenience the passengers. Nothing worse than being asleep at 7am and being awoken by an announcement about a bingo tournament. The only time you will hear announcements in your cabin is when it is imperative for the guests to be advised of an issue on the ship or a change of itinerary. The auto-gratuities are actually charged at the time of booking the cruise so you can challenge the charges onboard if you receive poor service. Check your first bill from when you booked. Auto-gratuities are common on 98%of cruise lines. Hope this helps for your future cruises ;)