The host was very helpful and gave me many local recommendations. And he is a sociable person and has friends visiting every day until late at night. I did not find it noisy, but rather the atmosphere was nice. The roommate's cat is also very friendly.
The location is in the center of Kadikoy, so there is a great choice of cafes, restaurants, and bars. I also enjoyed going around the hosts' recommendations.
The private room are spacious and there is plenty of room to spread out your luggage. There is a sofa in addition to a large desk.
The cleanliness is about average for a man living alone. Goo-gle map shows a bit wrong place then follow host's advice.