Marta is quick in her responses and flexible. Overall it was an excellent stay. Perfect location in the heart of Madrid in the main street , but isolated from noise. Air conditioning both in the living room and bedroom which is great given that Madrid is usually very hot. The place was sparkling clean and comfortable. You have access to a whole and modern apartment (with living room, kitchen, bathroom included). Only downside was that the bathroom had an unpleasant (related to heat?) smell but overall perfect stay and would highly recommend it for short but also longer stays! (Note: for late checkins Marta is very flexible but it comes at a cost of 20€ which is fine and noted on her page).