The place is the Fatih district, at five minutes walk from the mosques.
The bathroom is small but in order. The shower has hot water and good pressure. Towels were provided and changed on request.
The room is spacious, with a king size bed, two bedside tables, an additional single bed. There is a small wardrobe, and, in the same room (it's a studio basically) a small kitchen, with a small table with two seats, fridge, etc.
The room is decorated, and it has a wood ceiling. Unfortunately the room we have been given was at the ground floor, so we could here people going up and down the stairs, also people from the street or the reception. So, the only thing I didn't like about the place is that is noisy, and it took me one day to get used to it. The first night I wasn't really able to sleep. Also in Istanbul at 5 AM they sing a prayer, and they do that on very loud speakers. This happens everywhere unfortunately.
Overall I had a good stay, and I would rebook this place. The host is attentive and make you feel home. I recommend the place for a short stay.