Serkan is a great, very hospitable host. He can help with any question.
Apartment is really good. I felt myself like home all the time. Nice view from the balcony. There is everything you need for everyday life.
The location is the best. There are a lot of cafes, restaurants, supermarkets, bakeries nearby. Ferry and airport bus station is 10 minutes walk away. I really love Kadikoy and you should definitely stay here.