Location: Excellent, right next to Retiro - the Central Park of Madrid - and all of the museums. Quiet - but in a couple blocks able to go to some great restaurants and bars.
Amenities/Style/Apartment: Perfect. I have stayed in many AirBnb's around the world and this reminded me of what AirBnB is supposed to be - well furnished, cared for, and feels staying in a real home.
Hosts: I can't say enough. They understand what traveling is like and how to make someone having a great stay. They were super helpful when asked and also give you the space to make it feel like your own home.
The best AirBnB experience I have ever had.