Cenker is a wonderful host. I had a meeting in the morning and he allowed me to leave my suitcase in the appartment at 08:00 and he had to wait me till 12:00. I have had no time to lunch but to my astonishment I found plenty of food in the kitchen. Cenker even brought me some eggs.
The appartment is perfect for somebody who works remotely. Wifi speed is good (I work through VPN+RDP in another country). The neighborhood is very quiet but also very close to the tourist attractions. It's 5 minutes walk to the Istilal street and 8 minutes to Şişhane metro station.
The appartment is very cosy and spacious.
I liked my stay a lot and I was really sorry to have to leave.