The place was perfect: located directly in the city center, close the the vivid Chueca quarter and yet on the quiet side of the building, in walking distance of nearly everything, very large apartment, large living room, modern kitchen and bathrooms with everything (including soap, shampoo etc.), comfortable beds, great terrace, clean (like the whole city), equipped with everything (most of which we did not have the time to use as The City literally swallowed us) - and the whole building is very beautiful.
Carlos is extremely supportive and responds within minutes.