Just perfect! If you're only transiting through Madrid, don't hesitate a second. Really nice and clean bedroom, and so is the rest of the flat. Communication and organisation were simply brilliant. 10mn walk from the subway station and 4.50€ of Uber to Airport T1. Even the area is quite nice! The street is basically right against the airport, which is actually quite an interesting experience. Didn't hear any planes at night. Only sometimes sounds from the terminal, which can be easily covered by turning on the fan. Definitely recommend