My girlfriend and I had a great time in Ahmets place. Ahmet is a great host, and easy to get a hold of on the phone. He was waiting in the apartment when we showed up from the airport, even though I couldn't give him an exact time of our arrival. The apartment is small, but comfortable and the location is absolutely brilliant. Close to the tram, Istiklal street and the Galata Tower. Plenty of restaurants and bars nearby, and a cool neighborhood to wander in.