This flat is very well situated, very clean and just great ! It's a 5min walk to Plaza Mayor, and the San Miguel market. The subway is down the road and very easy to access. If you want to stay a few days in Madrid and do most of it on foot, I recommend this flat, for the 3 of us, it was perfect.
Our plane was delayed and Sergio was really comprehensive, he was already there when we arrived, and explained everything perfectly. Thank you again !