Great location and great views - two things that make this apartment stand out.
The location is perfect for a tourist. Steps from Galata Tower. Within a 10-minute walk to Galata Bridge, Karakoy ferry port (take a ferry to the Asian side), Istilkal Street, tram to Hagia Sophia, and some of the best restaurants in Istanbul.
The terrace has a spectacular view over the Bosphorus and Golden Horn. You can also see Hagia Sophia.
Communication with the host was very good, check in was smooth.
Note that the apartment is on the fourth floor with no elevator. But the view is worth it.
The street is very happening in the evening. Bring earplugs if you are a light sleeper.