This location is mere meters from historic, touristy Madrid. It is about a 7-10 minute taxi ride from Atocha train station (cost was about 8 euros).
The apartment is stylish and large. Large swathes of its brick walls have been left un-plastered, really adding to the space's charm. The laundry machine does it all in one go: wash, steam, dry. For travelers on the run, it's a great thing. The apartment has two bedrooms and two full bathrooms, as well as two small balconies overlooking the pedestrian zone below.
You will have to lug your baggage up several flights of stairs, so be warned. There is no elevator. I must add, however, that our host's representative that met us (Alberto) helped us carry up our luggage. Much thanks to Alberto. Also, the hosts frequently checked in with us via text just to make sure everything was okay, and to see if we needed anything.
By the way, across the street from the apartment is a convenience store, which sure came in handy. I would definitely book this apartment again for future trips to Madrid.