Had a fantastic visit to Madrid over Christmas! Lovely apartment in fantastic location for exploring the city. Walked everywhere. The apartment was clean and comfortable for two couples. As others have mentioned, there is street noise from overnight recycling/garbage pickup and generally voices echoing off the walls of buildings. We live in a big city, so we considered all part of the experience of staying in central Madrid. We loved the location and would stay again. The apartment management company was responsive with communication. A great base for exploring a wonderful city!