I have stayed in more than 10 Airbnbs in Madrid and this is my favorite! The apartment was super cute and equipped with basic necessities: bath towels, toilet paper, salt, olive oil, tea/coffee, dish soap, hand soap... The location is fantastic. You are 3-5 minutes walking from metros Principe Vergara and Goya. For tourists this is a direct line to Sol, for non-tourists, Goya and Salamanca are walking distance with great non-touristy shops and restaurants! You are 1 block away from Retiro Park. This is an amazing park with a lot of trees and greenery. I highly recommend this apartment!