We loved Carlo's place. It was clean, comfortable, well provisioned and roomy. Carlos was very quick and helpful whenever we had questions and was flexible with our check-in and checkout. We enjoyed the multicultural liveliness of the neighbourhood and all the local amenities including the cafe a couple doors down (El Rincon Guay) The local Sunday flea market was amazing: a very local, non-touristy market. The location was excellent with easy access (~10 min walk) to 3 different metro lines (one, Tirso de Molina, being direct to both Atocha and Chamartin train stations) and lots of non-tourist shops and restaurants. It was only ~15-30 min. to walk to many of the major tourist sites in downtown Madrid. We would happily stay there again.