Hasan's apartment was perfectly situated near Taksim square. The room was clean and sufficient, as was the bathroom and living room. There are two rooms in the apartment, I believe is either rented out or stayed by Hasan. We didn't get to meet him but his friend was there to greet us when we arrived. We were only there for 2 nights but it was the ideal spot. The Havas drops off on the other end of Taksim and is a short walk from the apartment. The ferry to the Asian side was also a short walk/ one tram stop away. All the other major sites are also short train/tram stops away.
The only small problem we encountered was that the water stopped working in the apartment the morning we were leaving. It eventually turned back on a few hours later.
Thank you for the short but convenient stay!