The location of the apartment is good, 5 min from grand Bazar and close to Aya Sofia. There is good restaurants and different shops near by. The T1 tram is also 5 min walk.
Erol was a good and very friendly host, as he has a restaurant just down the building, I often saw him and he helped us several times with Taxis.
The apartment itself is suitable for 3 persons, just small details to improve: more towels and better kitchen tools.