We spent a great week in Anil's apartment. It has everything you need for a few days in Istanbul. The flat is very centrally located, walking distance from the Bull Statue, SöğütlüÇeşme Metro Station and Kadiköy harbor and there is a supermarket and nice bakery across the street.
Downside from the central location is the noise, traffic is very loud almost during the whole night. Free alarm clock from the mosque opposite included ;) Water pressure in the shower is rather low and there sometimes is a cigarette smell from the smoking neighbour.
Apart from these little downsides, we had a good stay. Anil was very nice and communicated excellently and even provided us with some Restaurant tips and two bottles of water and coffee when we arrived.