The stay at Sinan’s apartment was really pleasant experience, the hardest part was to get to the actual location, but this is because of the Istanbul traffic - if you are brave enough to drive to city center prepare yourself for some troubles, but the good news that nearby are some paid parking lots. The apartment itself is small but really comfy (2 air conditioners). It has great restaurant just 15 m below which serves some great dishes, definitely recommended for anyone. Communication with Sinan is outstanding, she replies fast and speaks english really good. The location is pretty good because it is close to historic center, but unfortunately this city part is literally dead in the night. Bear that in mind if you are going for some party.