Great location for a few days exploring Madrid. I'd recommend exploring on foot so that you make the most out of time there. It is not a big city if you are sticking to the central suburbs. The apartment did what we needed it too with a double bed, single bed, and ensuing bathroom, and Cesar was very helpful, making lots of recommendations of places we could go and see and eat at. We were kept awake a few times by neighbours talking / TV as the walls are quite thin and the bin men (that seem to come each night) on the street outside and there was also smoking at the property from another room.