Our recent stay at Marcelo's apartment was a fantastic experience. The apartment looks exactly as presented in the pictures, is conveniently located to restaurants, metros, etc. and walking distance to a lot of sights. It is also extremely clean and has a lovely welcoming and homely feel about it. We stayed for 5 nights but you could easily stay for a longer period as the apartment is extremely well set up with everything provided. We would definitely book again or recommend to friends if they were to visit Madrid.