First of all, Mar is great. She is fun, open-minded, helpful, great host. Our flight got delayed and we arrived quite late, after midnight and she received us with big smile and warm hugs. She even spent quite a few minutes to show us the place and give us great tips of what to do in Madrid and the best places to eat. The location of the flat could be better. It's in the middle of everything, on a walkable distance, but still quiet enough for a good night sleep. Definitely would stay there again.