The apartments look the same as shown in the photos. Modern and new, the 11th floor of the high-rise building.
But the area near the house is developing now, so it's dusty, and builder vehicles going close. Actually, it won't bother you, there is no reason to walk around.
Be careful about the way to the place. We came to the nearest metro station, and it was tricky, I would say hard, to overcome the road interchange with luggage. On another side, if you are already there, you have a bus stop near and a bus to Kadikoy every 10 min.
Berk is very polite and responsive! He is worried about your staying and you could write him at any time.