Great place for staying in Istanbul. There are a lot of cafe, restaurants, shops, metro station and everything you need near this apartment. Also there is a port just in 5 min walking, from where ships will get you on the other side of Bosporus or on prince islands.
One more point to choose this place is the staff. Even if you are going to visit Istanbul all alone you won’t feel loneliness, because every evening you will meet these wonderful guys ready to talk and help with all you need.