We stayed in Isik's apartment for two nights

The neighborhood was quiet and safe, albeit its proximity to Taksim square and Istiklal Street. We never felt worried walking back at night to the apartment. Small grocery store is open 24hrs just 100 meters away from the building. Money changers and Kebap seller are everywhere and open til late at night. Borek seller is just around the corner for your daily breakfast needs. And Taksim Metro station is only about 3 minutes walk.

The unit itself was very clean and neat, even my wife who usually is always kind of a clean freak, really appreciates the cleanliness of Isik's apartment :) Amenities were provided by Isik, drinking water also, so we dont have to worry about buying bottled water before coming back to the apartment. Kitchen amenities, stove, kettle, microwave, dishwasher all are provided although we didn't use much of it.

The only downside I can think of, maybe only the steep stairs that goes to the unit on the 3rd floor. It may not be suitable for you with heavy suitcases. But I'm sure Isik can help you somehow with that. And also the TV that really had limited English language channels. Although I am sure you don't come to Istanbul just to watch TV all day, do you? So a little bit of BBC news after I came back from travelling and in the morning before we start the day is good enough for us. So I highly recommend this unit. Nice job Isik :)