Alfonso is a great host, very nice and available. Our flight landed in Madrid at 11pm so we checked-in around midnight but Alfonso was so kind to wait for us with no problem. The flat is small but sparkling clean and very quiet. The position is also great, only a few metro stops away from the city centre (Linea 5) or even walking distance if you love exploring (50mins to Chueca/Tribunal etc). Highly recommended for a few nights in Madrid.