We - a family of four - stayed in the apartment for four nights. It’s a perfect location, very central and literally across the road from the nearest metro. The apartment is lovely - spacious, light (courtesy of the three balconies) and maintained and furnished to a high standard. We had a couple of small issues with the Wifi and the TV - Alvaro, who was always contactable, managed to resolve the former.
In short, if you’re looking for somewhere to stay in Madrid, you won’t go wrong here.