Sergio was a very helpful host and provided useful maps for Madrid and kindly provided toiletries upon our arrival.
Apartment is conveniently located near major tourist attractions like Sol, Plaza Mayor, Mercado de San Miguel, and Reina Sofia. There’s also a grocery nearby where you can buy supplies if you’re planning to do homecooked meals.
However the building is quite old, so you can really hear the neighbors through the walls. This was no problem for us, but light sleepers be warned.