My friends and I stayed on Özkan's house for 2 nights and 3 days (long weekend). This is a lovely old three-storey house in the heart of old part of Istanbul. The terrace on the 3d floor has a lovely view over the city and the sea (the house is located in the high part of Istanbul). Özkan is a very friendly host, unfortunately Özkan was away from the city and we didn't meet him in person, but he organised for a lovely lady to meet us at the house and explain everything. Özkan also very helpfully organised for our transfer from the airport to the house. We didn't have any problems at all. If you want to experience real Istanbul with its everyday life and stay closer to its people, Özkan's house is a perfect choice.