I think there are at least two types of travelers. One kind goes to places like Mexico and goes to places that, besides the warm beachers, could be the US. The food is Mexicanized, so there are tacos and such, and you can go with little interaction with what's happening locally.
Playa Del Carmen is a rocking city. There are hundreds of restaurants, including one in a cave. There are many fun shops and people come from all over the world. There are far more Canadians and Italians there than US Americans. Hotel Delfin is located right on the main street of town, so you just walk out the door and you in in the middle of the fun. It is 1/2 block or so from the beach, so if you want to hang out on the beach, it is right there.
The hotel is solidly built, so if you decide that all the activity in the town (many nightclubs, music venues, and general fun) is a bit much and you want to get a good night's sleep, it is no problem, inside it is clean and quiet.
In an all inclusive, you might be anywhere, but if you experience Playa Del Carmen, you will never forget it. Hotel Delfin is probably the best hotel in Playa for having your cake and eating it too.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC