In general, this property is very well located, and it is reasonably well equipped in most respects.
The overwhelming driver of my negative review is my experience with the air conditioning. When we arrived around 10:30pm, it was extremely hot. I messed around with the AC controls (which, like the property as a whole, had no instructions) for a while and finally concluded that it must be broken. I felt that this was enough of an emergency to contact the after-hours host. They were difficult to get a hold of but eventually did respond. From that point, I will give them credit for staying up late to contact an AC repair person and arrange a repair for the next day. However, even after being repaired, the AC would only remain on for about an hour at a time, because the electrical system was not able to keep up with the demand and the circuit breaker had to be flipped and the AC turned back on every hour. Otherwise, it was off and the place got hot. Unfortunately, it was like this for the remainder of our stay. And this was with the fan set to low and the temperature set to no lower than 22 C.
Bottom line is that the AC situation at this place is unacceptable, especially for a place as hot as Madrid in the summer.
Also, there is a lot of construction debris on the street in front of the apartment. It makes it feel creepy out there at night. If I had the choice I would stay somewhere without all that going on. I doubt it will be cleared up anytime soon.