Location of the studio is awesome! Studio is 10 min walk from Taksim Square & Tram #1 (going to Sultanahmet) as well.
It is very quiet and near grocery stores, laundry service, barber, Vegan Istanbul restaurant (the best place for proper cooked vegan dishes), and Cihangir Tarihi Simit Fırini (an awesome bakery with delicious baklava). Prices in this neighbourhood are much more affordable than Sultanahmet.
Studio is new and very clean, and the host is great to communicate with. Is has all the essentials, but not more that that. If you are planning on using it for cooking (and you don't need to do that in Istanbul :) and need lots of space for your clothes, it won't work. But if you are using it mainly to sleep over - it is perfect for the price.
We were very happy with the place and would definitely use it again when traveling back to Istanbul. :)