I stayed there for 3 nights and I really loved the place. The apartment was so clean and smelled so good plus, they have a laundry room in the building for free! Moreover, Carlos was really nice and so helpful! Moreover, there is 3 minutes away parking lots for reasonable price if you have car. *Important note: there were many really weird people hanging out around the apartment, but they haven't caused any problem! Nevertheless, Carlos's apartment is highly recommended place to stay while in Madrid.