I just got back form Bahia Salinas (Costa Rica). The spot is just crazy, the wind blows really hard, I was riding a 7 everyday but one day with a 9.
The spot is fairy flat, and not very deep, super wild, lot of nature. Cool rides to the island a couple of miles away. Not many kiters on the water.
good service: rent, hotel, transfer.
There are direct flights to Liberia airport.
I spent couple of days visiting the country as well, just amazing!