The flat is conveniently located in the city, close to Plaza España and around 40 min from the airport (tube lines 10 and then 8). It is located in a quiet street and can accommodate 4 people (we were 2 couples), each had a double bedroom. The flat was clean and the owner was friendly and available. Thank you, Montse!!! From the flat, it is very easy to sightsee the city by foot (you can walk to the Parque del Retiro, in about 1h, which is great!). We really enjoyed our stay and highly recommend this flat!!!