This is a great place to stay for one person. Perfect if you need a place to crash and get over jet lag or if just need a simple, clean, and safe place to lay your head at night after spending all day exploring Madrid. The apartment is right next to a Civil Guard station, so safety in NOT an issue. The building is on a quiet side street in a lively section of town. It's about a 15-minute walk to El Prado and 2 minutes from some great restaurants and a metro stop.
Gloria was an excellent hostess. I had trouble finding her place, but she was in constant communication with me, and guided me straight to the apartment like an air traffic controller. She gave me some great recommendations for restaurants, museums, and neighborhoods to visit.
The kitchen and bedroom are clean and simple. The kitchen and general living area are shared with Gloria. The bedroom is all yours.
As noted, the apartment is up several flights of stairs. If you are injured, it could be a tough climb. Though I broke a sweat in the summer heat, I was able to get up there with a backpack and a suitcase!