Metin was a great host. The location of thid apartment is just superb. not only is it right next to the key attractions at sultan ahmet, it is also a 2 min walk to the tram station Gulhanay on the main line. This makes it super convenient to also visit the Dolmahbace Palace and to get to the ferry for the Prince's Islands.
it's a bit of a climb, albeit a 2 min one, on a pedestrian only street, so travel light.
Also, take the airport transfer shuttle that Metin offers to book for you. very very convenient and pretty much the same price as a taxi from the airport.
thanks Metin!