This is an amazing and authentic place. In real life it looks even better than on the photos. It is located in a historic building, but has everything one needs in modern life. The bed is comfy, the internet is perfect, it was very warm inside in winter. All the kitchen utensils were available. The only downside I can think of was a steep ladder to the 3rd floor, but it wasn't a problem for us even with heavy bags.
Enes was very welcoming, he was available on Whatsapp all the time, and answered a lot questions on directions from and to the airport. We could easily check in very early in the morning (at 4am).
Would definitely recommend this place to anyone, and would definitely come back here on my next trip to Istanbul!