PERFECT. There is nothing I would change about this place.
The location is AMAZING! We never once had to use the metro---we walked everywhere, including Prado and Reina Sofia. Plus, the best tapas in Madrid are RIGHT THERE.
The apartment is well decorated and organized. Nice space for hanging out. Nice sized bathrooms and bedrooms. The beds are comfortable and the sheets are the nicest I've ever had at an airbnb.
For being SO CLOSE to everything, it is remarkably quiet.
I would absolutely stay here again!