The best feature of the apartment is location. 5-10 minutes walk from Pta Atocha Station and from The Prado museum. It fit perfectly with our travel plans.
The design of the space is sulu sh and efficient, as indicated in the photos. The sofa is a bit worn but otherwise everything in the apartment seemed to be in good working order.
Outside the apartment we had some problems with the key entry to the building at the street. Even though we were warned in our arrival info, we had difficulty on more than one occasion and the problem seemed to be worsening. Paula says she is going to speak with the building management about making improvements.
Be aware that, upon entry, you must go up a half flight of stairs and then down a very steep, dark, winding full flight into a basement flat. We took a pocket flashlight with us when we left the flat so that we could see better upon return.
All said, Paula's flat was a good choice got us during our brief stay in Madrid.