Location is perfect, very central, easy walk to anywhere and a few metro stations nearby.
I didn’t get any specific instructions about check-in, so ringing the doorbell was a bit confusing. People would appreciate more details, I think.
The room is decent and the building is a typical and beautiful old Madrid building. Only one small towel was available though, and the bedsheets looked worn out. The toilets are used by lots of rooms, so there can be a bit of a wait in the morning. Toilets were clean but there was no toilet paper.
Overall great location, affordable price, so if not going for comfort, I definitely recommend it.