Hey
@Smooch - As you probably gathered by now, the overwhelming response is that sailing on DCL with or without kids is great, and I'm going to agree! You also asked about meals being included with a note that you aren't familiar with the offerings. So I'll address that.
Yes, all meals are included with the exception of dining at Palo and Remy. Both are adult exclusive restaurants that require reservations. Palo is available on all 4 ships and is a formal dining experience serving Italian cuisine. On itineraries that include a "day at sea" (not stopping in a port) Palo also offers brunch. Remy is available on the Dream and Fantasy ships, and is even more formal serving French cuisine. If you are familiar with the parks, think Victoria and Alberts. Likewise, Remy also offers Brunch (and Dessert-only) offerings on itineraries with a Day at Sea. While they are an upcharge, its not that bad. Palo is $30/pp and Remy is $85/pp (Brunch and Dessert offerings are less)
As you noted Alcoholic beverages are also not included. You can bring your own (limited to beer/wine no liquors, and limited quantities) but if taking to a restaurant will incur a corking fee.
Otherwise all meals are included. This includes all other restaurants (lineup varies by ship), which you will experience each of during your cruise through DCL's "Rotational Dining". When you are booked you are assigned a rotation, so your meal on Night 1 is at Animator's Palette, and on Night 2 it is at Enchanted Garden, Night 3 is at Royal Court, and then Night 4 is also at Royal Court but with a different menu. (Just an example, your rotation is random). This ensures you get to try each restaurant. You will also be seated at an assigned table. Your table number rotates with you so if you sit at table 112 at Animator's, you'll sit at 112 at Royal Court as well. Also rotating with you is the wait staff. Your servers will come to know your drink order, and dining preferences as your cruise carries on.
All of this only applies to dinner btw.
Each morning breakfast is available in one table restaurant (but you will be seated and paired with a server at random). There is also room service, and a buffet option as well. Speaking of the buffet - it is also available for lunch and dinner, along with a number of food stations around the pool deck (Pizza, Sandwiches, Salads, Burgers, Fruits, etc.)
There are also buffets on Castaway Cay (Disney's private island, included in most Caribbean and Bahamian itineraries).
There are also tea/water/coffee/soda fountains available throughout the day.
All of which are included in the price of your cruise.
Hope this explanation was helpful