Overall good value for the price. I recommend it, provided you are not deterred by some goofs around cleanliness, ventilation/humidity, uncomfortable shower cabin missing a door. The location is very convenient for sightseeing in the older parts of the city -- for the price it's perfect. The place has good security features, which is important in Istambul: there are cameras throughout and cctv system is in working order. My belongings were safe and intact.
Overall good value for the modest & very affordable price. Communication with the management is perfect - I used watsapp, worked perfect for me. Recommend for backpackers who are not after something posh or amazing, but rather seek practical inexpensive accom.
Some criticisms:-
One will need to do a bit of own cleanup, if you want a good standard of cleanliness. There were hairs in the bed and the floor is not super-clean. The bed linen was of dubious freshness, and the bed felt humid (possibly due to humidity coming from the shower room, and needin). Also, the place needs to be aired more by leaving the windows open regularly (both in the room as well as the shower), as there is no good ventilation system, thus the air is a bit stuffy, unless you open the windows.
In addition, the bed is such that the corner of the mattress falls through into the innards of the base of the bed (if you sit on the corner of the bed, that is).