Having been there, (obviously as the one who started this thread) I would tend to think a/c is not really necessary. We weren't there during the rainy/humid season and while it was hot during the day, it cooled down nicely during the evenings. The buildings sit high on a hill and do capture the nice breezes and views. Even if the units were air conditioned, I cant imagine using it. There's just something about being in the tropics and feeling the breeze on your body. There are ceiling fans, over the bed in the unit we rented and the one we stayed in for one night. That was more than sufficient to allow a comfortable nights sleep for us. I acknowledge everyone has their preferences.