Renan was a great host. He was super responsive and met us at the apartment to let us in, show us around and even left us a welcome bottle of wine and other beverages (even helped me take up my heavy luggage!).
Apartment was just as seen in pictures, super clean and comfy... Don't get discouraged if you don't see a living room - you won't need it as you'll be out all day. As an American I first thought the neighborhood was sketchy but it's super safe (police department down the block) and lots of great places to eat nearby. Thanks to Renan we had lunch at Public (lunch there was 11.50€ pp and included 3 course plus wine, great deal). Close to Grand Via and a couple minutes away from Plaza Mayor. Would totally stay again when we go back to Madrid.