The apartment is really nice and clean. The bathroom is spacey, the kitchen had all the necessary amenities, the couch is comfortable and bedrooms have places to store your clothes. Overall very satisfied.
One of the downsides is that the apartment is located in the neighborhood "Las Cortes". On street view it looked nice, but it is not a safe place. During the day it's okay, but at night DO NOT GO THERE. Even though there is police on almost every street corner, there are a lot of criminals and hookers on the street.
As the apartment is located at the edge of the neighborhood, you can completely avoid it by walking through the metrostation first and enter the city from there.
The old city centre is a 10 minute walk from there, which is beautiful to go to.
Conclusion: Great apartment, not the safest location. If you want to go with kids I would reconsider.