Ali was a great host. He helped me with the keys and location even when he had to be out of city at around the same time. The place is situated at the best location just opposite to Radisson blu hotel. The view from the balcony of common area is amazing. You can walk to almost everywhere in a span of 15-20 mins. The galata tower is a 10min walk and Taksim square is a 20min walk.
Since the flat is located at the top floor of the building, you might have to reconsider if you cannot climb a flight of stairs.