Full suites get Club class dining for Dinner each night, Lunch on Sea Days and you get to dine in one of the Specialty dining restaurants (usually Sabatini's) for a mimosa Breakfast each morning. (The breakfast is the best part of this deal, it is never crowded and while there is a menu they'll basically get you anything you ask for) You get the use of the Suite lounge on Royal Class ships. For two hours each evening they serve beer, wine, cocktails and appetizers. Alcoholic beverages are only available (complimentary) during those two hours. There is usually a themed night several times during the voyage. The concierge is also located in the Suite lounge and helps with dining reservations and requests.
You can also grab Soft drinks, bottles of sparkling and still water and mixers. They have an espresso machine and hot tea. The room attendant leaves two bottles of water per day, but we grabbed extra water when needed and sodas as well. At breakfast they had fruit, pastries etc. and at lunch hours they have sandwiches and fruit.
The first time we sailed in a suite on the Discovery Princess we had the plus package. We never used it. The second time, we cancelled it. We changed the mini-bar setup to two coffee cards and on a 15 night cruise we barely used that because there was always coffee across the hall. (We like the S4 suites near the concierge lounge)
My husband is convinced we will cruise no other way....