I think the setting, which is tropical junglelike. Guests can sit on the balcony outside their room and watch all sorts of bird life. I also live in a quiet area outside the downtown/beach area, which is packed with tourists and really noisy. So guests can have the best of both worlds- walk 20 minutes down nice rural roads and spend the day at the beach and check out the restaurants and touristy shops, and then come home to a peaceful retreat surrounded by nature.
As far as the listing itself, what I think makes the guest room a bit special is that while it's small in terms of square footage, it has lots of windows (six- one on every wall), plus an outside door my guests usually leave open when they are home, high ceilings, and is an unusual shape, so that makes what could feel like a very small space quite bright and not feel cramped at all.