Great apartment, close to Lavapies Metro station. The area is really culturally diverse and appears to be undergoing gentrification, with some great bars and restaurants close by (I would recommend Mas Al Sur - a great neighborhood restaurant a few minutes walk away).
The apartment is light and airy and is equipped with everything you need; iron, hairdryer, air con etc. The bed is really comfy and the interior is stylish.
It is a 15 min (approx) walk to Plaza Mayor & Mercado San Miguel, all attractions are in easy reach of the apartment.
If you have time I would also recommend a visit to Toledo, easy to reach by bus from one of Madrids stations.
Natalia was really helpful, allowing us access to the apartment early - as we had a early morning flight - and booking a local taxi back to the aiport (30 Euro).
Overall a great stay. Thanks