I spent some months at Ivan's place and could not have enjoyed more. The flat is in a very nice neighbourhood with great people, supermarkets, and restaurants. There is several options of public transportation whereas the historic centre of Madrid is only a 10-15 minute walk away. A fan in the room keeps you cool during the hot nights in Madrid during summer. Ivan and his mother are there to help whenever you need it. All in all, it is a highly recommendable place to stay.