We stayed at Kristian’s place for a night only but it’s completely ready for a long stay too. The location is awesome, 2 minutes away from Sol station, though really quiet and peaceful.
We were lucky to have an early check-in time, too. I would expect this kind of a superb apartment to be fully booked all the time.
Kristian also provided a lot of detailed information about navigation and local bars/places to see.
The apartment was clean, and perfectly ready.
I would definitely recommend it to anyone looking for a place to stay in Madrid.