What else can I say that hasn't already been repeated multiple times over? Ali and his family are incredible. Ali and Filiz were really helpful in describing where to go and how to get there. The apartment is a 5 minute walk to the Little Hagia Sophia and a 10 minute walk to the Blue Mosque and regular Hagia Sophia.
I would return in an instant. I wholeheartedly recommend anyone visiting Istanbul to stay with Ali and his family.