We stayed at Lina's place 3 nights. She was very responsive and accommodating for check-in. Lina as a host is warm-hearted. She even surprised us with bottle of Spanish red wine. Regarding the apartment, its location is excellent! You are in the city center and every sight seeing spot is at the walking distance from the apartment. Also the Internet connection is very good. The apartment is a bit dark without day light and it is on the ground floor. Anyway, it is great if you stay in Madrid few days and visit the city's sights. It is small, but comfortable. I would recommend this place.