We spent 4 amazing days in Madrid in Valentina's loft. The place is perfect for a family of 4 like ours. Roberto (Valentina's friend) gave us a fantastic welcome and showed us the place and gave us tips for getting into Madrid. The loft is about 10 minutes on foot to the Metro, which gets you to Madrid in about 20 minutes.
The loft has a car space which worked great for our rental and allowed us to explore Toledo, Segovia, Avila, and El Escorial.
I would recommend anyone to stay here.