We stayed at Demir's place for a whole month. I can say that the location of the place is quite good - it has a great transportation accessibility (bus, metro, ferry) and it is close to different cafes/bars in Moda.
The pictures of the flat match the description and reality, only living room is a little bit smaller than we expected. Shower is a little bit shabby and with not really good ventilation and light. Anyway the flat has everything that you need for your stay. Wifi connection is very good - it was very important for us as we work remotely (4 people used internet at the same time - it worked good during calls, even when we played games).
I want to have a minute and say a big thanks to Demir and Nazil for their prompt replies. They both are really hospitable, friendly and try to make your stay as comfortable as they can. It was easy to communicate with both of them.