The apartment is very near at the public transportation and also 15-20 minutes at the main sights of Blue Mosque and Agia Sophia, but there is a big uphill, so if you have many or heavy luggages I suggest you to get a taxi. The neighborhood though is not so good.
Yavuz was very kind and helpful with us from the day we arranged the accomodation. However, there is no elevator and our apartment was at the 3rd floor. In addition the apartment has enough space for a couple or 2 people, but hygiene wasn't good enough (dirty towel/bedsheet).