two young men managing the property in a 12 hour shift were extremely helpful, they went out of their way to help us when we were caught at the border by police checking and not carrying our passport (coming back from a trip to Gallipolli), they managed to open the room, take out our passport and take pictures and send via whatsapp in 15 mins time.
they were always helpful and cooperative, replacing the room key immediately when we lost our purse (pickpoket in tram), received our parcel from konya, helped us with car and driver for the day trip to Gallipoli.
location of the HUB flat is excellent, very close to Istiklal street, all food joints, but just at enough distance to be out of noise pollution.