Frank was very warm and welcoming, and was there when we arrived. He gave us a quick tour, but explained everything with detail and made us feel at home. The apartment was very clean, and had all the basic essentials. The common laundry came in very handy, and also had a dryer. But above all: LOCATION!! The apartment was in an ideal location, and we were able to walk everywhere with ease. Supermarkets, restaurants and transport were all a few steps away!
And a final note - no need to catch a taxi to/from Atocha Station, its an easy walk:)