I stayed in Gloria's apartment for 5 nights while exploring Madrid and for that occasion, the place is perfect - walking distance to the very nice barrios of Chueco, Salamanca and Malasaña. The apartment was clean and relatively quiet concerning that it's located in the inner city. As written in the description, the staircase leading up to it is quite steep so it can get difficult when you have a lot of luggage - I got used to it quickly, and didn't find it problematic. The locks in the apartment are sometimes a bit tricky to operate, but once you get the hang of it it's fine. Overall it's a good place to stay when you're in it for exploring this beautiful city.