Have just spent four nights at Ricardo's apartment and have had a great stay. All contact with Ricardo was very quick and we were thankful he was able to allow us access to the apartment at midday after our very early flight arrived. The apartment is very conveniently located just off Gran Via and within easy walking distance of most of the main sites.
Apartment was very clean, and the bedroom was very quiet as it faced away from the street. Would definitely stay here again and would recommend others to stay here.
Just a note for other visitors, the nearest metro stop, Gran Via, has one line (1) out of action at the moment, and appears to have been that way for some time, so you'll need to make other arrangements if you planned on using it. We found out when trying to catch train to Atocha Renfe station for a regional train connection.

Thanks very much Ricardo!