The flat is very clean and tidy and in a great location. It is very close to the main train station, with good transport links to the city centre (which is only 25 minute walk away). The flat provides everything that you might need for your stay.
The flat was probably a little small for 3 persons but is perfect for a couple staying in Madrid for a long weekend.
Paz was extremely responsive to email and her daughter, Alba, provided some great advice (in English!) about the city.