Fehmi conveniently arranged transportation to and from the airport for us for a reasonable price. He also had people help bring our luggage up to the apartment, which was a great help since the stairs are steep and windy. (That's definitely something to keep in mind if you have trouble with stairs). Our flight was in the evening, and Fehmi stored our luggage for us after check out (and also had someone bring our luggage down).
The apartment is tidy, functional, and a great location. The Blue Mosque and metro station were just a few minutes walk away. There's also plenty of restaurants and stores nearby. Fehmi loaned us an Istanbulkart pass so we could get reduced fares on the metro.
We were four adults staying for a week, and we all fit comfortably. The bathroom and common area are rather small, but that was fine for us since we were out all day. The bedrooms were both well sized, though. Fehmi offered cleaning and towel/sheets replacement whenever we liked. We didn't get the apartment cleaned, but we replaced the towels mid-week. Fehmi came up to deliver them minutes after I messaged asking him when I could pick them up.
Thank you for hosting us Fehmi! We had a great time!