Hola, I stayed a week in Akumal, at a place the locals called Los Arcos, about 20 miles north of Tulum. Beautiful setting and I loved the food. Formal dining room offered fabulous dishes. Outside was the lunch, snack bar, providing thatched roof huts with tables and chairs on the sand. The pizza was made in a big, adobe oven, and was the best I had eaten.
Don't miss Xcaret, the worlds largest, natural, swim-in aquarium, (a little theme-park-ish, but in a natural way, like floating down the river on tubes), also with great restaurants.