This apartment is in a perfect location to walk to all the main attractions. My favorites are the Plaza de España and its beautiful gardens, and the stunning Real Alcazar. I also recommend the Archivo General de Indias for its excellent free exhibition, and the amazing outdoor Metropol Parasol in the center of the old city.
There are also countless great restaurants and tapas bars close to the apartment so, although there is currently not a full kitchen (just refrigerator, microwave and small apliances), I ate lots of good food every day. For something simple to bring home, I loved the Pizzeria Urbana about two blocks away.
Pablo is very helpful, and met me at the door when I arrived. The apartment is clean, comfortable and quiet, and a short walk from the train station.