I stayed in Marisa's apartment for the whole month of March 2022, and I really enjoyed it! The apartment is small, but cosy & nicely finished and perfect if you're out all day (I was in Madrid for work). The street and neighborhood are amazing: you're close to El Retiro Park, lovely shops, bakeries etc around the corner. The building itself has lovely old details.
Marisa let me in and showed me the important things about the apartment, that I needed to know. She was very welcoming and helpful! I would definitely recommend her apartment for a stay in Madrid. Muchas Gracias!