I spend a month in that apartment and it was super nice. It's small but very comfortable. Really close to the Metro and Marmaray (if you want to go on the east side of the city). Lots of shops and restorans around. Especially Turkmen cafe "Dasoguz City" next door — be the first to get the best kebab in Istanbul!
The host was very nice to me, so does housekeeper lady. They always be there for me. You can order a 20l drink water with delivery. Climate control was great. And the water was hot!
Nice place