The apartment is very well located.
5 to 10 min from the Blue Mosque, Agia Sophia and Topkapi Palace.
Shops and restaurants are nearby.
6 min from the tram station.
10 min from the sea if you want to go for a walk (However keep in mind that you can't really swim in Istanbul littoral. The closest beaches we found are in the Prince's islands easily accessible by ferry).
The apartment is clean and the rooms bright.
It can be a little noisy if you don't close the windows, otherwise it's fine. AC is available but we didn't need it.
Fehmi was very very responsive everytime we asked him something.
Thank you Fehmi.