The location of the apartment is amazing to see the most important historical sites in Istanbul. The Grand Bazaar is 5 minutes walking distance while Sultanahment and Hagia Sophia 10 minutes or 15 depending on how fast you go. The apartment had everything you need for a short stay and we really loved the possibility to heat the apartment as it was quite cold outside.
The only small minus is the noise that you hear from the outside, but considering it is an old Ottoman house it is something to be expected, only that it might be disturbing from time to time.
We really enjoyed our stay.