My family and I had a very nice 3-day stay at this apartment in late June. Lola was very professional throughout the process and very communicative. We were met on arrival day as promised by Maria, who gave us a very nice orientation. The value of a stay at this apartment in my opinion is the the amount of space you get for the money. My family of four does better when travelling when we can spread out in our lodging, and we were pleasantly suprised by how much room there was in this apartment. The bathrooms and bedroom were very spacious. The A/C and WiFi worked perfectly. The trade off, I suppose, is that the area is somewhat removed from the traditional tourist areas of Madrid. If you want to walk out your door into the heart of the action, this may not be the right place for you. But we had no problem hopping on the metro at the nearby San Bernardo station for an easy ride to Puerta del Sol or Retiro or wherever else we wanted to go. In fact, after a busy day of site seeing, it was nice to come back to a relatively quiet, authentic residential area. My wife and I enjoyed a drink in the nearby Plaza Comendadores one evening and remarked at how we were the only "tourists". The busy Plaza was filled with neighborhood children, adults coming home from work, and students. Very different from the Plaza Mayor.
We felt very safe throughout our stay at the apartment. The only drawback to this place might be that we didn't find any good restaurants within walking distance, so dinner usually involved a metro ride.
Overall, I would highly recommend this apartment to anyone looking for a good value and lots of space in the city. If you want something right in the middle of the tourist action, this is not the place for you, but for us, it worked well.