Ugur was so helpful. He booked a restaurant for dinner for us on the night we arrived, which was great since our flight was delayed and we were very hungry and tired. He also arranged transportation to and from IST airport, which considering the distance, was the best way to get from the airport into Sultanhamet. He provided great advice on when to go to the very busy mosques, allowing us to walk right in and avoid the hot queues (4pm!!). The rest of the time, he was very unobtrusive, allowing us the freedom to just explore, however making himself available for any questions we may have. We rented the 3rd floor flat and seemed to have the whole building to ourselves, especially the top floor terrace (only 4 floors total), which was our favourite place to sit after dinner to look at the views across the Bosphorus at night and listen to the call to prayer. The shop next door was also very handy, allowing us to buy water, yogurt, fresh fruit, honey, butter, cheese and milk.