I lived in this apartment for 6 months so you can say I know every nook and cranny. That being said I had a fantastic experience here in terms of the location, the amenities, and the host and cannot recommend this place highly enough.
Location: It is located in the heart of Kadıköy. You can get all the groceries you need at the nearby open market or at the many local stores. You are spoiled for choice when it comes to restaurant options. The apartment is on a street known for antique shops that sell many interesting Ottoman era objects. There are also several bars that spill out into the streets in the evening. It should be noted that you can hear sounds from the street when you sit in the living room, but it should also be noted that the bedrooms are quiet since they are on the opposite side of the apartment so it won't disturb your sleep. The sounds are mostly just pedestrians, patrons of the bars, and shop owners talking and not anything obnoxious like traffic. The record shop owner directly opposite does play records starting in the late afternoon which you can hear, but his music taste is good and he closes at 9pm. Frankly his music was one of my favorite parts of living here. Other than that, you are about a 10 minute walk to the bus stations and the ferries, and a 15 minute walk to a great park by the sea where you can bring a few beers and drink on the rocks. The park also has a running/bike path, for those who want to stay fit. Speaking of which, there are several gyms minutes away. Overall, I would recommend this location to anyone who wants to be close to where all the action is. It might not be the best for those who want to a live in a calmer location. It worked out great for me though.
Amenities: The apartment has an excellent well equipped kitchen, with a proper stove and oven, all the kitchen supplies you need. It was by far the best kitchen I've seen in an Airbnb. There's even an espresso maker, a French press, and a panini maker, all of which I used often. The apartment is also tastefully decorated and has excellent natural light coming through the windows. The sun directly hits the living room early in the morning around 7 to 8, then directly hits the bedroom side of the apartment in the afternoon. The living room boasts an impressive library for those who can read Turkish. There are also a wide variety of sheets available in the closets. Finally, there are also excellent foldable chairs you can take to chill in the nearby park.
Host: Serdar is the chillest and most helpful Airbnb host I've ever had the pleasure to interact with. If there was ever a problem with the apartment he would reply instantly and fix it. He also was down to grab a beer with me and show me around since he lives nearby. One time I even had the pleasure to meet with him and his lovely wife and baby. Of all the hosts I've had, he is the most approachable and friendly. You don't feel like he is merely conducting business with you, but rather that he genuinely wants to make your stay great, all while not being too pushy and giving your space if you need it.
Overall, I repeat that this AirBnB is absolutely fantastic in every way imaginable and I highly recommend it, you will not regret it.