The apartment was perfect for my stay! Rosa was very easy to communicate with and was always available. The apartment is a little far from main attractions (however it is close to El Retiro park), but it is easy to walk everywhere (10-20mins). It was very clean, and spacious. I was able to check in early, and concierge even held on to my bags after check out as I had a later flight.
I would recommend this place to anyone coming to Madrid!