Look somewhere else
Nice and long deck over the sea, easy access to swim and excellent water views.
Didn't like the food, impossible to get reservations to one of the three (menu) restaurants -you'll need to wake up at 6:30am to make a line for an hour to reserve- so you'll be stuck with buffet, rooms don't feel clean enough, too much noise at the hotel. If you want a peaceful place to relax and eat well/healthy, this is not the place.
The location and the sea view from the deck.
Everything is designed to be unconfortbale. Worst checking process I have ever seen. Every activity, like meals, snacks etc have strict schedules. Staff is not as polite as in bogota or Cartagena. Food is ok, not wonderful. Open bar is crappy, there are no fresh juices available. Facilities are old.
Quality of drinks
The Decameron Aquarium hotel in San Andres is built on the water at Punta Hansa, on the extreme north end of the island, and approximately 2 km from the San Andres airport.