This is the first hostel I've ever seen that has no kitchen. And in a non cheap city like Istanbul, a kitchen can be very useful. Showers are not the best and I don't think they are enough. Breakfast and location are though.
I didn't like this hostel, the staff I was in contact with was unhelpfull and rude, rooms are not great, bathrooms are not enough (and sometimes they don't work), and to reach the hostel you have to climb for a while.
The building is beautiful, they offer good breakfast, the rooms are very nice.