I've lived in Istanbul on and off for three years, staying in Airbnb flats mostly, and my three month visit in Engin's place was by far the best! My plane arrived very late at night, but Engin was available to give directions to the taxi driver and then greet me at the flat - helping me with my luggage and then explaining apartment details. He had even thoughtfully shopped for those first necessary items that are needed when you're too tired to go out the next morning for coffee and breakfast.
I emailed Engin a few times with minor questions, and every time had a prompt response.
The flat was clean, quiet, and well stocked with kitchen items and great linens. I had no problems with my extended stay. Another wonderful feature is the air conditioner/fan. If needed, I could close the windows to block out the always on going construction noise and dust that is a permanent feature of life in Istanbul.
The location was convenient also. It is easy to walk to several grocery stores or take public transportation to any part of the city.
No complaints - only my highest praise for Engin and his very comfortable and inviting flat.