This is a hotel (private) room advertised on Airbnb.
Carmen was a great host, check in and check out went fine.
The room was well organized and tidy, the main strength is its location: just across Atocha rail station.
A major drawback of this place is the bed and A/C. The bed is a pair of traditional IKEA- like single bed put together, but they would move apart from each other as you move. The bed is not suitable for couples.