This is a very stylish flat with everyting that one needs for a comfortable stay. Everything is brand new, nice and clean. Location is great: especially for the art lovers - Reina Sofia is 10 minutes walk,15 minutes to Prado museum and Caixa Forum; Lavapies metro station is in front of the building; the main train station Atocha is 20 minutes walk; there is a big supermarket just around the corner.... El Rastro flea market (on a Sunday) with the most amazing antique shops lining the surrounding streets is also 10 minutes away.
Alfonso was a great host, he was very prompt in responding to emails and he was also very generous to let me keep my suitcases in the flat longer on the last day, because it happned for the flat to be free and I had an evening flight. All is all, I had a great experience and I can only warmly recommend this place!