Bego was amazing. She received us at the apartment. Gave us the grand tour and showed us how the very high tech appliances worked. She left a binder with instructions, maps, and nearby restaurants.
The apartment itself was beautiful and comforting. It was immaculately kept. Appliances were all touch screen. Each bedroom has its own balcony which was quite the treat. Very conveniently located. Right by the opera house, royal palace and plaza mayor. All within 5–10 min walk. The metro/train station was steps away from the apartment making traveling across the city very convenient. The commute to Buen Retiro park was 13 min.
The only downside would be the plaza attracts some homeless people at night. Sometimes they sit on the stoop to the apartment. That said, they are not loud and do not bother you.
Felt safe at all times. A bit costly but worth every cent. Would stay here again if visiting Madrid.