Location could not be better - landmarks like Plaza Mayor, San Miguel Market, and Puerta del Sol are all a few minutes walk away. Everything needed is nearby - metro stops, banks, grocery stores, and countless bars and restaurants.
Apartment is on the top floor of a building (with elevator) and has a great view. The windows seal well and block out most of the noise from the street... but bring earplugs if you need total silence to sleep.
Ruben is a great host and was very quick to respond any of my questions. I had a wonderful time and would love to stay here again!