The house location is awesome. you get to see black sea from your room. I can't comment on public transport much as we had rented car, but I saw public buses and bus stations near by.
The house has some eateries and grocery stores within 200 meters.
the sea beach is 700meters with a beautiful children play area on the beach. you get to park your car on the road infront of the house for free.
the house was clean. The draw back was it had only one toilet and the house was not very well equipped. But let me tell you the best part, and that is Koray's parents. they live upstairs and they r the two of finest people we met in our trip. they were always available for all our needs and always with smile. They helped us with everything. If we visit Istanbul again, we shall definitely stay here or atleast go to meet them if nothing else.