Özgür's flat was an exceptionally comfortable, clean and welcoming stay.
First, I will say that there is hardly a better location. The flat is hidden on a side street less than 5 minutes from the major shopping, entertainment and dining areas within Moda. Similarly it is only a 5 minute walk from Kadikoy metro station (and taxi stand,) and less than 10 from the ferry stations. This location means you're able to access taxis, metros, and ferries to reach any location within the city with ease, even reaching major landmarks like Hagia Sophia on foot in little time, never mind being able to travel in comfort and style. This is also true in reverse, it is very easy to get back to Özgür's flat, and you will have no trouble finding transportation to make it back at the end of the day. Similarly, any guests you might have, or any food delivery drivers or couriers will be able to reach you comfortably and with ease. I was visited by local friends who all commented on how accessible and easy to reach the location was, which made it far easier for us to spend time together and not worry about coordinating travel or meetup locations.
Second, the flat is well appointed and furnished. At no point did I find myself missing any critical component, and after visiting local markets for sundries I was able to have all of the comforts of home including doing my own laundry, though beware that air drying your clothes is the norm in Turkey, though the washing machine will spin the clothes nearly dry. I'll make special note that the shower was quite roomy and very adjustable. As a taller person used to American style walk in showers, I must admit I was turned off by the 'booth-like' showers in many other Istanbul AirBNBs, but I was very comfortable with the shower stall during the stay.
The flat was very private, with the windows having black-out style curtains to close out any curious eyes. I had no 'neighbor noise' to speak of, despite the flat above me being populated with at least a younger couple. The locals are incredibly considerate and excited to meet travelers, and I was able to build a rapport with a few local shops who were eager to help and happy to see me when I visited for things like water or snacks. The only locals you'll need to worry about are the seagulls, who might wake you up once or twice. Personally I found it charming, and it was a reminder of the proximity of the sea, which was only a few minutes away.
I will definitely consider this flat again first when staying here again on my next trip.