Marie is a fabulous host and very quick to respond to any questions. Her lovely apartment is in a perfect location for a stay in this wonderful city. Walking distance from all the major tourist attractions - The Palace and Cathedral are a must, as is a flamenco show; daily tapas and a glass of sangria and, you have to try the de nata :)
One tiny tip is to take earplugs if you're a light sleeper - as the apartment is in a narrow road with the buildings close together, noise can resonate.