Sara's place is a great value in an unbeatable location (we could literally walk to the Prado in five minutes)-- Sara was very responsive to our questions and was kind enough not to charge us for a small bedside table lamp broken by our 3-year-old. The apartment was also newly renovated and sparkling clean. Overall we had a great stay and wouldn't hesitate to stay here again. It was definitely spacious enough for our family of seven.
The only quirk I would note is that the apartment is laid out in a fairly odd fashion-- It is in a space that seems to have been once used as a retail store-- it's on the ground floor and with a large "display window" out front in view of the only common living area so there's not much privacy there.
And there's not much natural light in the other rooms, which are down a narrow hallway. The kitchen is on the opposite end of the apartment from the dining room and the two bathroooms are right next to each other (none of the four bedrooms are en suite)-- but these quirks were reflected in the price, which was really an incredible value for this area. So as long as you don't mind the quirky layout, you will be delighted with this apartment and it's very responsive owner/manager.