The property is clean and we felt very safe there, however as a frequent traveler to All Inclusive resorts, many things fell short of our expectations.
One of the most memorable things from my first visit to Cancun more than 30 year ago, was driving the Hotel Zone and seeing all the beautiful resorts located along the ocean. You will not have that experience here as the location is quite a distance north of the Hotel Zone and felt very isolated.
The dining hours and options are limited with NO room service. The 24 hour food that is advertised as room service is actually nachos, cold hot dogs, hamburgers and sandwiches kept in a fridge at the sports bar that you have warm using the microwave in the bar.
The pools along with the associated bars close at 7pm and everyone is shuffled to the stage area where they make a big deal out of their "parties". Everywhere except that area and the sports bar shut down at 7pm leaving the entire rest of the resort oddly vacant. Luckily it was not crowded when we were there, but if had been this would be a big problem.
With a few exceptions (pool bartenders) the staff was not overly friendly or accommodating. Every other All Inclusive that I have stayed at really made the experience feel like a true luxury vacation. Riu Dunamar made it feel like the guests were children that needed to go to bed early and if you wanted a bedtime snack it was only going to be a crappy food that you had to make yourself. All considered, I would not return.