The apartment is great. It is very central and everything you need is in walking distance with many little cafés and shops and of course the galata tower. Also public transportation and all other things that you may need are very close by. The apartment is very clean and has a nice bed and bathroom and the kitchen is fully equipped.. The Wifi is working perfectly. I follow my studies online and it never broke down or slowed down.
Fatih is a wonderful host. He always responds very quick and is a very trustful person. Overall I can highly recommend Fatih as host and the studio apartment if you want to stay in Istanbul.