We stayed a whole month at Saadet's appartment. Its a lovely place located between Taksim and Kabatas. You can get to Kabatas in a 5 minute walk (streets have ups and downs), you can take the funicular, the metro, the tram or the boat to go to the Asian part of Istanbul.
Saadet was very kind and helpful, even without knowing her personally. She was available all the time.
The place was clean and confortable with all the things you need to have a nice stay.
Bedclothes and towels lovely. It has a lot of space to keep your belongings. The main room is specially big. The kitchen is equipped with all you need to cook. We only missed having a microwave.
There's also a small market few steps away from the building. We would stay there again if we had the opportunity to be there again.