From the airport we took a local train (3€) to Atocha station, which is near the flat. On the way back Uber was 21€.
The flat itself is at the basement floor, but has enough light. The window looks at the empty inner yard of the theatre, so it was very silent.
Flat is equipped to cook.
Location is just perfect in all terms.
Though I think it's more for 2 people.
In general we had a very good stay.