overall, for a day or two the apartment is okey, as the location is great (near taksim and istiklal) + Bahram is a great host (clear instructions and check in system + very friendly person, who worried about me during instabilities in istanbul), but for a longer stay it is not suitable:
not the best place where i stayed: it's dirty, the apartment smells, furniture and all the equipment is old and needs some repairs (for instance, mattress is skewed, and water temperature is not constant - it is hot and then cold just like in katy perry's song, the washing machine is not private).