We had a nice stay in Juan’s apartment. We were in Madrid for a Congress and it was well located on the metro line going to the Feria de Madrid/Airport, and on the line going to the city centre. The neighborhood felt safe. Lot of grocery store, restaurants at 10 minutes walk.
We were two. I would not recommend this apartment to a group of four persons. The bathroom is located 1 meter from the main bed, and is closed with cupboard doors, so it lacks of privacy.