Awesome location, perfect for discovering Kadikoy, close to everything. Flat is spacious, wifi worked well. No bad smell in the bathroom. There is a washing machine and drying shelf, the kitchen has everything needed. Be careful to not leave anything tasty for ants open in the kitchen though.
It is on the ground floor, so not super bright, facing a parking lot (Kaya told me people cannot see me when windows are closed though), people park immediately in front of the window. I had no problem with safety though. Since it faces parking lot I often needed to leave the windows closed especially when I went out and the room can get really hot and stuffy, which also means there is good insulation to keep warm in winter.
There are three doors leading to this apartment and a little courtyard space. No upstairs or downstairs neighbors.
I usually didn't hear next door neighbors much in the living room, but in the bedroom I heard their normal talking voice super clearly, thin walls. I sleep with earplugs so didn't bother me too much.
The portable AC makes very big noise with the compressor, I told Kaya and he immediately arranged me a fan which was enough for me.
Kaya is a very helpful, kind, and responsive host. He really wants to make your stay comfortable. He showed me the neighborhood and recommended me a buffet place which became my canteen for the month lol
If you want a very helpful host and enjoy this great location but don't want to be next to the parking lot, he also has other flats in the building, and somewhere else in Kadikoy too.