Good place in a nice area (city centre of Madrid). There is everything around (shops, nice bars and restaurants). The train station is not far. The flat was very clean. The host was nice.
However for a group of 4 people, the place is quite small and we barely had enough space to eat breakfast in the morning. Also the appartement was quite humid while being on the ground floor. It was ok, and we could deal with that but when paying almost 400€ for 4 nights in Madrid on Airbnb, one would expect a little more comfort.