i have and i did not like where i stayed. but we were like an hour or 90 minutes from the airport. i forget the city.
that said, costa rica is huge and i know there are nicer places. i went for a wedding that was at a double tree hotel which was situated between 2 volcanoes so the beach was dark water. the food was mediocore at best as well, and the drinks were watered down to shit.
i'm not saying i will never go back to CR, but if i did, it definitely would not be in that location. i'd much rater go elsewhere than back there. i also am not a fan of all inclusive in general.