Claudia's place is perfect if you are on a budget and want to be 15 min away from Madrid's center.
The neighborhood is clean, quiet and has restaurants, restaurants and cafes within walking distance.
there is a café/panaderia next to the apt building with great coffee and delicious selections of pastries.
In terms of the place you get what you pay for. A small room with a twin size bed which is comfortable enough to have a restful sleep. As there is no noise coming from the street you will have no worries about that.
the bathroom is small and very tall people might have a hard time using it but the bathroom is clean, with hot water.
I did not use the kitchen as eating out in Madrid is very cheap.
again if you don't want to overpaid for your stay and rather use the money on something else....stay in Claudia's place.