Cesar's place was amazing! the room is very private with locker, it is located on the first floor easy access, the room has a private bathroom that is extremely clean and it came with three towels, the experience feels just like being in a hotel :) very comfortable and clean.
The area is super central, you can walk to all Madrid's touristic locations, museo del prado, puerta del sol everywhere super close, and it is a safe area too, many people walking around by night so you always feel safe, and the room is quiet so perfect to rest after a busy day : )
I will definitely recommend it to my friends visiting Madrid and will book again next time I visit the city! Very affordable for all the things you get.