A great place to stay if you're looking at the Kadikoy area. Everything was clean and working. Plenty of hot water. Note that it is more like a Hotel than a AirBnB, as there is a check-in on the ground floor, and the owner is there and they can look after your bags if need be. I believe there are multiple floors, so the pictures might not be exactly what you get, but it was good enough.
The best part was the location, being just across the road from them Havaist busses. It is very close to the yeldeğirmeni area, and there are so many restaurants and cafes nearby.
The room might be a little small for 2 people, but very comfortable as 1. It is also right near a busy road, and some car noise is audible in the evenings.
Otherwise, an excellent accommodation!