Punta Cana resorts are… well resorts. That means that many resorts lack local culture and that you will most likely miss on authentic local cuisine, music, dance and other customs. Some resorts do better than others but either way you will experience very little of the real Dominican Republic.
Beside the lack of local culture some of the resorts are also known for notoriously not really good food and upset stomachs can be common. Compared with American standards some rooms can seem a bit dated. This of course is not the case in the newest and most exclusive resorts.
Not all resorts allow kids and families. There are several Adults Only resorts in Punta Cana. Some are Adult Only sections within a larger resort complex, sharing facilities with other sister resorts. Some are stand-alone Adult Only hotels.