We had a great stay in this apartment. The hosts were very helpful in answering all our questions, the check-in was easy (we were able to leave our stuff inside the flat even before the official check-in time), the flat was clean and well-equipped. There was a working conditioning, which helped us to survive hot summer weather in Madrid. The flat is located in the very city center just a few minutes walking from Sol metro station. Keep in mind that there is a bar right below the balcony, which could be quite loud until late hours. So if you are easily disturbed at night by loud sounds better take ear plugs with you. Otherwise everything was perfect and I could definitely recommend this flat.