Had a great time at Felipe & Pilar’s apartment. The place itself is spacious, as described and clean. It is located within walking distance to the Metro and Atocha train stations, and to top it off its right next door to an underground parking lot if you drive in.
The area seems sketchy at first, but after we got over it we were walking back at midnight with three kids and it was quite safe.
If any, the only negative was that it was a little noisy but this is not something F&P have any control over.