This is one of THE BEST places we've stayed at.
It's about a 10 minute metro ride from the main train station (puerta de Atocha) and then 10 minutes walking to her house.
Me and my sister were welcomed with open arms and Vereniz was super informed and helpful giving us an overview when we arrived and was open to answer questions or give us suggestions on the city.
The room and bathroom (as well as the common space) was very clean and spacious -accurately depicted by the pictures. The street where it's located is quiet and safe but just a block away (5minute walk) there's the Main Street that leads to bars, nightlife, shopping, food, and anything you need. It took us about 30 minutes to walk to plaza del sol or parque del buen retiro and 45 to walk to plaza mayor. If that sounds bad it's not- we were looking in the shops and cafes and we didn't even notice we were already at our locations (with A LOT of good food on the way).