Overall well proportioned flat, great air conditioning (welcome in the Madrid heat in August), comfortable bed, well stocked kitchen, plenty of coffee pods supplied by the host for the Nespresso machine, and a strategic location for getting around Madrid easily. Host was very responsive and communicative.
On the downsides, the flat smells like there was once a smoker living there, it bothered me quite a lot, perhaps it wouldn’t bother others as much. While the location is strategic, it’s not as salubrious as other streets of that area. And TV could use an upgrade to include streaming channels but I guess it depends what you want from your stay.