Luisa's apartment is superb, it's really well located in a lively district just a short walk from the city centre. There is a metro station a few steps away and convenient shop right next door. The apartment itself is well equipped, modern and beautifully clean. We had excellent communication from Luisa and were met on our (late) arrival by her father who handed us the keys and gave us a quick introduction to the apartment. If you're looking for a place to stay in Madrid I'd highly recommend Luisa's apartment.