I only stayed one night but i would definitely recommend it for a longer stay :) the dorm rooms are clean and the beds are comfortable. There is no separate shower space in the bathroom, but it's surprisingly easy to shower, it functions very well. The staff is super nice and friendly and always available :) the roof top terrace is a unbeatable highlight, the view in on the Bosporus is a highlight and the breakfast you get up there is very good :) you start perfectly into the day at Antique Hostel