Do not hesitate to book this apartment! Gonzalo was a great host and always very responsive with anything we needed. The apartment was in the perfect location - we were able to walk to all major sites and there is a metro stop close by. There are a ton of bars and restaurants right outside your door. Even though it's located on a lively street, because of where the apartment is situated in the building it is very quiet and we did not hear any street noise.
We had everything we needed in the apartment, including some toiletries, soaps, detergents, etc which was really nice. The bed was very comfortable. It was also nice to have information on city recommendations from Gonzalo.
We really enjoyed our time here, and will not hesitate to stay in this AirBNB when we return to Madrid!