We had a wonderful time in the Hub.
It is just a very short walk from Taksim Square where you can hop on the Big Bus for a sight seeing tour. Or get on the venicular that will take you down to the ferries at the Bosporus.
The apartment was clean and cosy. Anas, the housekeeper, was more than helpful!! He showed us the way. Not merely by pointing it out, but walk us to it. Everybody was extremely friendly and helpful. We highly recommend the Hub, Istanbul, for your stay.