Great apartment in the center of Madrid. The best service I ever had in Airbnb.
The host had a guest pack in the room which included the clothes washing powder and liquid. It was very thoughtful for traveller.
The air conditioner had issue at the first night we stayed there and the host gave us a free upgrade at the second night! The host was very helpful and response message very fast on WhatsApp.
Check in has to be done on their App. Hope there is website instead of App in the future.