I had a great stay in Kemals Apartment. There is a reception for check in, which was without any problems.
The room was big and clean, and was even upgraded to a bigger room including a further living room.
I have not been in the apartment during day time and only slept there, but it was located in the center close to Galata Tower but at the same time the neighbourhood was super quiet which was really great.
All in all great experience.