This apartment was great, 2 minutes walk to Tribunal metro stop which had the 1 and 10 lines that take you to all the good places in Madrid, including Chamartin and Atocha, for the Renfe trains out if town. Malasana is a great neighborhood and there was plenty to do around the apartment, and often we found ourselves back very close to the apartment at night. If you want great tapas, try Bar El Tigre!
The hammock was a great touch and the beds were comfortable. There were a few hiccups with our stay (on demand water heater cut out) but Felipe was available via WhatsApp immediately and it was an easy fix.
The apartment had an elevator that we could hear occasionally, and people were smoking in the courtyard which created a smoky smell several times a day for a while. This was probably the quest thing about the apartment.
These were very small complaints compared to the comfort and the location of this apartment. We had a great stay!