I think you are right about the Bella category as far as Cabin selection and dining times. I did not see any restrictions on various activities. We just booked yesterday and chose the Fantastica Balcony category and selected early dining. We did receive $200. onboard credit and was able to select our cabin number. It is my understanding there are some activities and venues that require additional pricing or may be available with higher categories such as the Yacht Club. We didn't explore the Aurea category as we did not want to pay the higher price. We are leaving out of Port Canaveral and this itinerary will spend 2 days at their Private Island. This will be our first MSC cruise, and have sailed on numerous lines in the past. Hope this might answer some of your questions.โบ๏ธ