This place is exactly as showed on the pictures, the rooftop and its view even better! The location is great, just by the Galata Tower, with both Taksim square and the main sights (Haga Sophia, Sultanhamend/Blue mosque, Grand Bazar etc.) in 20-25 min walking distance.
We arrived after midnight, but that was no problem for Dilek. She came to give us the key and show us the flat at 1am in the morning. Some taxies have difficulties to find the flat, but Dilek kindly called the taxi driver to explain the directions in Turkish.
One thing to note is that there is no lift, so you need to be able to climb 6 (?) floors on foot.
We were a group of 5 people and we would all love to go back.