I've booked Economy Single Room, 1 Double Bed. It was so cold in the Istanbul, some how most of people wore jacket outside. Moreover, hotel's heating system had been inactived and I had to wear number of clothes over each other, all over the time I stayed there.
Besides, cigarette's smell was annoying inparticular about who don't smoke.
Lack of suitable slippers in the private bathroom and to use of cardboard-cloth slippers could cause to slip if you don't be careful.
But the room, mattress and blankets were cleane. Yes. The room was clean and despite of to be unspacious, could provide propare place to stay a few days.
I should say that you should change the money before to go the hotel because they don't accept you even if you had paied for some days in advance. Particularly about Iranian, because of sanctions that have eliminated possibility to satisfay primary needs. So it brings situation some unfair people (Iranian or in other nationalities) exploit these conditions to swindle sanctioned people.