Very clean and cosy apartment well located close to the train station and about half an hour's walk from the centre and many of the attractions within. Of course this is Madrid there's a metro round the corner and plenty of buses, city bikes and other options. I had a great stay. Check in was easy and Lucia was very kind and helpful. The Wifi is really good too no problems at all. Checking out was fine too, I left the key on the hooks in the corridor and I could leave by pushing the exit button in the hallway.
Just a little note, Spanish light switches seem to be further inside the bathroom. There is a little switch above the door, don't be tempted to pull it, it's attached to a heat lamp that doesn't seem very stable.