Just spent a week here on vacations with my parents. I couldn't chose better place. Very nice apartment and great location! Close to everything, just walking distance from Hagia Sofia and Blue Mosque from one side, and waterfront area from another.
Celal is a wonderful host, he and his staff are alway ready to help with everything. Celal organized the transfer from and to airport for us and arranged the pcr test for return flight. It was great not to spend extra time for figuring all these details during our short time at Istanbul.
I definitely would stay there again and recommend the place to everybody.