I had the opportunity to stay in this very well placed flat. Its ubication allowed us to walk to almost every place we wanted to visit and we got the feeling to be in a neighbor frequented by locals, so that added a very valuable experience.
The flat has standard amenities, but I'd highlight the air conditioner in the master bedroom and living room, as well as a fan in the secondary bedroom, which was very appropriate for our summertime visit. By the way, the fact that there are two rooms made me decide to reserve this place as I didn't find any other nice option around.
If I come back to Madrid, I know where to check for availability first ;)