The apartment is small, but very comfortable and well located. You're at the heart of Madrid and at a walking distance to most attractions and metro station.
The neighbors are nice and polite. Internet was good and reliable and easy to join. Everything was clean and disinfected. Most people don't care, but the shower is really good too!
Obviously, parking in the center of a major city is really hard, the best options are to park in a near by garage (garaje) for €22 a day or a bit further out in the blue and orange zones which will cost you about €6 per day. The closest to the apartment is near Temple of Debod. From 21h00 to 9h00 parking is free.
Patricia is a great host, she was flexible with the arrival time and always very communicative. She also added some nice touches to the apartment to make our stay more comfortable, especially the water bottles in the fridge that saved us in the Madrid summer!