The appartment is really close to the train station which is very convenient if you have to take a train. Also, the Prado and el Parc del retiro are near, that is a good thing !
The room is clean, there is not much in it, but there is everything you need ! Carmen's son was really nice, and willing to help me if I needed anything. Everyone I saw in the appartment was really talkative and smily, that was a nice stay !