The location is perfect, 2min walking from metro and main touristic street. Also the bus from airport stops very close. This is the place to be in the city.
The apartment was good with a comfortable bed and great bed linen. It has a washing machine wich we used almost everyday. It is very silent, so you won't wake up with the loud singing of the Mosques 5x a day. The best feature for us is the backyard, big and private covered area, where we stayed most of the time, perfect for having a cigarette with some wine. Wifi was fast and worked all the time. Enver is buying an electric oven soon, and with that I think the kitchen will be complete.
Enver was very friendly and respectful, was always available in whatsapp and helped us with several requests, and speaks good english.
When back in Istanbul I wont search for another place.