Maria Jesus & Jorge’s studio is a very good option in Madrid. The studio is close to the city center within 15-20 min walking distance to Plaza Mayor, Puerta de Alcala, Fuente de las Cibeles, Parque Retiro, etc), and two-stops away from the Madrid Atocha train station, which easily connects with you with other places (e.g. Toledo, Barcelona, etc), and is very convenient if visiting outer Madrid is in your schedule.
Due to its size, the studio itself is ideal for solo travelers or couples at most. Families would struggle a bit. Also, it is very well equipped, although there is no AC, which would have been great for hot days like the ones I had!
Maria Jesus is very responsive and an excellent host. Thank you for everything!