I would recommend Geira's place because it's in a calm, everyday neighborhood that's removed from the tourist hustle and bustle, but close enough to be easily accessible. The cathedral and royal palace are a 15- to 20-minute walk from the apartment across the river and up one of the steepest hills I've had to climb in a city - but if you don't mind a short hike, it's nicer than taking the metro. (The metro is just a few blocks away, though, and easy to get to!) From there, you can walk to Plaza Mayor, Puerta del Sol, and other major sights. The room is small, but more than adequate for one person on a short trip. The whole apartment was very clean. (The only caveat is that if you are sensitive to scents, reach out beforehand - the apartment is very clean, but scented products are definitely used.) Tea and soluble coffee are available, and I was able to use the microwave and keep a small amount of food in the fridge. There is a small living space on the closed-in balcony for eating and relaxing, which was nice. Geira is very nice, though I actually interacted more with Geira's boyfriend, Jackson, who is very helpful and accomodating. Her two small dogs are sweet, and will be your best friend if you pet them, but largely just like to nap on the sofa. If you're looking for a calm, small, affordable space for a few days that's close to the tourist center, this is a great option.