I have stayed in Hasan's flat for 2 nights and it was perfect! October is not so warm in Istanbul, so the lack of air-conditioning was not at all a minor. The flat looks like on the pictures. I personally loved the living and dining area which had a lot of natural light and also the bedroom, which had a good bed and pillows. The location is PERFECT!!! A lot of cool bars, restaurants and shops. You have to go up a steep hill to get to the building so watch out if you have big luggage. We arrived by taxi, so it was not a problem for us and when sightseeing, we walked which was again not a problem to walk up. If I ever comeback to Istanbul, I will definitely contact Hasan again. Strongly recommended!