First, the location. The building is in a very good, central but quiet neighborhood with good restaurants, cafes and a supermarket right around the corner. It is also well connected. Many popular places are located within a short walking distance. There are also 2 metro stations nearby (lines 2, 3, 5) and some bus stations. For those willing to watch a live flamenco show during their stay, which I enjoyed so much, Teatro Alfil is situated within just 4 minutes walking distance.
The room is small but convenient for short time travelers. There are toilet papers, towels, hand soap, shower gel and shampoo along with global plugs for travelers from outside Europe. There’s also an air conditioner and some coat hangers. Hot water was available the whole time and the bed was comfortable. The room I stayed (room 43) can handle a mid size luggage only, though, and a bag or two. So if you have a bigger luggage choose another room in the same building. Also, the Wi-Fi connection was not stable, but it was working. And finally, yes, the walls are thin but there was no disturbance during my stay.
All in all I would recommend this room if it is a short stay and you don’t need much space. I also want to thank Edu, the host, who was nice and responsive.