This was absolutely the best and most beautiful accommodation I ever had anywhere. The location is simply perfect as Plaza Mayor is the nicest plaza in Madrid. Also, you can find a lot of restaurants and souvenir shops around, San Miguel Market (which is absolute must) is 3 minutes walking distanc, metro "Sol" around 5 minutes, maybe 10 minutes to the Cathedral and Royal Palace.
The apartment itself is spacious, very nicely furnished and decorated and perfectly clean. All the photos are real and the apartment is even nicer. We just had anything we needed and wanted and it way really our home far away from home for few days.
But, all of the above mentioned would not work without Noelia and Mario, the most kind and helping hosts ever :-) Even before we came Noelia gave me some very useful advices, than, after our arrival, Mario explained to us what to do and where and how to go (you can find whole book with useful tips in the apartment) - especially the tip of sunset at Temple de Debod was perfect.
Simply, when (not if) I'll come back to Madrid, Noelia and Mario's apartment is the only choice.