We were 5 and booked Yavuz’s place for 5 nights. The location of this place is great about 5-10 minutes walk to visit historical places in Istanbul. The communication was smooth and Yavuz and specifically his uncle was so responsive and helpful.
However, the apartment has some issues that might make your stay unpleasant.
1- The building itself is old, on second floor with lots of stairs so I don’t recommend it if you have lots of luggage or you are traveling with elderly people.
2- The water heater package is inside one of the bedrooms and makes a loud and constant on/off noise. We had to sleep in the living room because of the noise.
3- There is only one small, cramped, and uncomfortable bathroom which is located between the bedrooms without any exhaust FAN.
4- The doors handles make squeaking noise during night so it will easily wake everyone up.
5- The kitchen is small, has only a cooktop and there is no microwave or toaster. Therefor, if you like to make breakfast or cook it won’t be easy.
6- The place and specifically the bedrooms are smaller than what is shown in the pictures.