I stayed with Leticia and Mohammad for 6 weeks. The neighbourhood is great! There are a lot of little cafeterias and restaurants that are close, cheap and really quite good! My favourite was El Carmen Cafeteria just a few blocks down on Calle Alcalá.
There is a solid lock with a key on the bedroom door. The mattress was good. They provide two types of pillows - soft and hard - so I had the perfect sleep. It was great to have the balcony on the hot nights because it kept the air flowing and cooled the room down. I recommend dropping the blind during the day to keep the heat out. There is a desk where you can work and eat. I loved sitting out on the balcony and having my dinner while I watched the sunset. So beautiful against the red brick buildings - very Madrid!
The kitchen is older but it has everything. Because I was living there I cooked a lot and used the amenities. It served its purpose.
Leticia and Mohammad value privacy and a quiet house. If you are looking for a place to get away from the noise and the rush of the city, this is it! As there are three rooms rented via Airbnb and at times up to 8 people in the flat it was nice that everyone respected the quiet. If you are concerned about multiple rentals please know that in Madrid this is VERY common and so the great thing about Leticia and Mohammad's flat is that it is quiet, respectful and clean. It is also great that they actually live there and there is open, direct and immediate communication.