10/10 would recommend!
My friend and I stayed here over the Easter Days and we really enjoyed our stay. The Apartment was well located and next to a supermarket, which was really useful. We explored Madrid 90% of the time by foot, Parque de El Retiro was just around 15-20min away, Puerta de Sol and Plaza Mayor around 45-60min.
The AirBnB was super clean, the check-in easy. All in all we had a great time, and would definitely recommend it!