Tolga's place is incredibly cozy and stylish. it has a room big enough for a couple with enough space for everything (lots of drawers, a closet and etc.) and a separate kitchen which has everything you need to cook a breakfast or a dinner including lots of kitchenware. Also there is everything you need to clean up the apartment (even a vacuum cleaner) and do laundry (washing machine, detergent and a drying rack).
There were absolutely no problems with hot water during our stay, it never got cold even after a long shower. The flat also has a heater and an AC. the bed is very nice and cozy and all the apartment looked exactly like on the photos.
We spent two weeks in Istanbul and Beyoglu area is absolutely the best place to live in the city for tourists like us. Very close to Istiklal street, Galata tower and Galata bridge area which is perfect for walks. There is a tram stop nearby where you can get a tram to Sultanahmet area with all the main sights but we usually just took walks.
(But get ready to climb the hills wherever you're going - this is how all of the Istanbul is:)
A supermarket (Carefour) is a couple of minutes away from the apartment as well as a nice bakery. on the way to Istiklal there are also tons of places where you can get some local food.
Tolga himself is an amazing host. He met us on arrival and showed everything we needed in the apartment. His responses were always very quick and he is the most helpful host we met on Airbnb.
The apartment doesn't have a TV but the WiFi is really fast and reliable and we were just watching movies every evening on a laptop. after all in a city like istanbul TV is not something you need the most. And this apartment will give you everything to feel like at home and at the same time an amazing location in the area with incredible Istanbul atmosphere.