The owner of the hostel was very friendly. He also upgraded our room in good favour. Cleanliness, room quality, hostel quality, breakfast quality, owner's help on booking tours of Istanbul, etc, everything was very good.
We loved our stay at Antique Hostel Istanbul.
The best of best part of the Hostel is the sea view from its terrace. It was a wonderful experience when we spent some time on the terrace at night and also in the morning.