I stayed more than two weeks at Ahmet's place and I felt extremely comfortable!
The house and the room is very clean. Ahmet is a very open-minded and kind person. He helped me in every issue he could.
You can use everything which is in the house - from the washing machine and the utensils to the spices in the kitchen. There is an iron and an ironing board which can be used. Water is for free. Ahmet also gave me a towel for my own use at the check-in. It was a bit cold in Istanbul when I stayed here, the house and the rooms where always heated! I really felt like at home.
The neighborhood is very nice. You can find anything you need around the corner. It's a 10-13 minutes walk to the metro station from where you can go wherever you wish to. The way from Ahmet's place to the metro has no hills, so it's not exhausting. You can also walk to Taksim in less than 30 minutes.

I really do recommend Ahmet's place as well for a short term stay as a long term stay! Thank you very much for everything Ahmet! It was a pleasure to meet you and to stay at your place.