Beatriz I think is the best host I had till now and I have used Airbnb a lot. Very responsive, friendly, checking in frequently to see if I needed something. I stayed to her house for 3 weeks and she made me feel at home.
The flat is on the ground floor next to the road but it is quiet. It had everything I needed, it was super clean, the wifi was strong and the mattress was top too.
The area is safe but boring, nothing really to do there, more of a working class area. The metro (Nueva Numancia) is 5 min away on foot and from there you can explore the city. However, there is a hill very close to the house which has the best views of Madrid from the top!
Overall, highly recommended as it is value for money!