Staying at David's place was a wonderful experience. As described, the apartment is situated very close to a nice little beach in a rather secluded bay in Santanyí. There is one bedroom and one living room, in which the couch can be converted to a bed. We chose to use the couch, because the view from the bed is absolutely spectacular - you can watch the sunrise over the bay right from your bed (which is quite large and comfy too given it's "only" a sofa bed).
You can have breakfast on the rooftop, and people from the neighboring hotel were shooting envious glances over ;-)
The only drawback is that it is really hard to leave this beautiful place!