Unfortunately, previous reviews are accurate - the flat is very dated: mold in the shower cabin, dangerously crooked ceiling in the bathroom (every day I was terrified that it will fall down), super dusty pipes and cables, faulty lighting, creaking beds, broken window, not so clean bed lining and towels, not working TV... The building is very old, so not a big surprise here. And the noise from the outside - horrible. And quite shady individuals occupying the neighborhood after dark.
However, the flat was warm and the water hot (and it was a blessing during the freezing cold days). No one broke into the flat or say anything abusive on the street. And Istiklal Street is just a few steps away as it is Taksim Square.
Great flat for party buddies, students or not fussy backpackers.