Azadeh's home is very authentic as it lightens up your soul as soon as you open the door as it is spacious, has high ceiling, large windows. We stayed 3 nights and Azadeh was easy to communicate even though she was not in Istanbul that time.
Location is superb, close to infamous vibrant Istiklal Street and local shops and restaurant. We felt very safe during our stay even though we could hear noises during the night so you might need some ear plugs.
The bed was noisy but Azadeh was very helpful to resolve the situation. The sofa bed was short so if your height is more than 180cm your feet will be out of the bed. The house in particular shared corridor smells damp but I guess it is due to the age of the building. However this was a minor problem as we get used to it after the second day.
Overall, I would recommend Azadeh's accommodation if you want to stay close to heart of Istanbul.