We had a wonderful stay in Istanbul. Hikmet is most welcoming host. He emailed me a detailed directions on how to get from airport to apartment and met us there with welcoming gift of fruit platter. And totally unexpected offer of complementary breakfast for next morning. It was lovely and delicious. There is a terrace on the roof top with several tables and we spent almost every evening there enjoying fresh air and view to the 15th century mosque across the street. Hikmet also arranged a transfer to airport for us as we did not want to use public transport. Overall it was a very pleasant time. The apartment is a 5 min walk from Blue Mosque and a little Sophia. And you can walk pretty much anywhere in old city.