Our stay at Taners apartment was great. Taner was always available and provided us with everything that we asked for.
He helped arrange a cab for us for the airport, helped us to move our luggage during check out and even provided us with small but important requests relating to toiletries, necessities, etc.
The apartment is at a convenient location and a 10 minute walk up from the metro as well as the sultanahmet square. The walk up is uphill but quite manageable. There is a forex exchange shop right opposite the building. The rate was not very competitive but really came in handy as we landed into Turkey, straight to Istanbul and needed to exchange Euros for Lira. The departmental store is close by. Also, lots of restaurants along the metro lines, in and around fatih.
Overall a very good stay.