We spent four days at Ayhan's flat with two friends. His place is really nice: clean and very well situated, in the center of Istanbul (near the Galata Tower and Taksim place, and you can go walking to the main places to visit such as the Blue Mosquee or the Hagia Sofia).
We really enjoy our stay there, Ayhan was really helpful and we hang out with him and his friends.We would totally recommend his flat and would stay there again when we go back to Istanbul. Thanks a lot Ayhan!