I had a fantastic time at Helen and Martín's flat, they are amazing hosts! They were very flexible about check-in and check-out times and were very helpful with regard to places to eat and drink in the neighbourhood. The location of the flat is absolutely perfect, it couldn't be more central! Easy walking distances to everything and so much going on, but at night the street is pretty quiet for central Madrid, so I got a great night's sleep. The flat is modern and loved the balconies looking onto the square! Would definitely stay here again.