I enjoyed my stay in this property. It was easy to keep contact with Memet during the visit and for example he came immediately to change light bulb after I reported one was not working. There was two minor inconveniences in the apartment: the shower doesn't have much pressure but it's working and is not too hot or cold. Other problem was that the apartment has light cigarette smell. It might come from the neighbours and is a very typical problem in Istanbul. Otherwise neighbours are quiet as there's mostly offices in the same building.
Location of the apartment is perfect. The metro station is located right next to it and you could walk to Taksim Square. Nearby is many different options for eating out or for street food. There's also small supermarket (Carrefour) downstairs. The view from the apartment is really good, you can see all the way to the Bosphorus.
If you're light sleeper take ear plugs with you because the apartment is facing a major road.
Overall I had very good stay in this apartment and I would definitely stay again.