Great, adorable little apartment. There is no air conditioning, just fans so if you're there during the summer it gets quite hot. There's also no window in the bedroom so keep that in mind.
Overall it's very cute. It's just a couple of minutes walk from the subway station to get you either to the center of Madrid or to the airport. It was nice for a quick stay!
The host was super great and very responsive to all messages. I'd recommend!