Isitmebut,
I think all of your requests could be met here at Los Corales except these:
"possibilities of B&B or half-board"
You cook your own food, there is a supermarket about a 10 minute walk north up the beach or a $5 taxi ride. Each apartment is equipped with small kitchen with dishes, fridge, gas stove with 4 elements only no oven. There is also an air conditioner in each apartment. There are a couple of restaurants on the complex and they are all great IMO. Our favourite is Soles on the beach, they play smooth jazz music, the beer is very cold and the food is good. A very nice place to spend your afternoons or evenings - the atmosphere is amazing.
"as for sporting activities"
There are no water sport at the complex, you may check with the Office I'm sure they would direct you to where you could book excursions.
Miss J,
I have to agree with you, we own a Villa at Los Corales

and for us it truly - is Paradise.
Just a few more years before we can go and spend our entire winters there
Rachel