Zoom Hotel was great. It met my every need. First and foremost, it is close to SAW airport where I flew in and out of. So I stayed there the first night when I arrived to Istanbul, before I went to Old Town Istanbul, and also the evening before my morning departure. It was only $40/night, clean, good bed, good shower, good WiFi.
Best of all was the kind service that I received from Deniz at the reception desk. I asked him for the best way to reach my hotel and he wrote down what I should do, and then he walked me over to the ticket machine for the public transportation system, and advised me how much money to get and how much money to load onto the card. I was very grateful for his kind service.