I spent more than two weeks with Besma in Sept-Oct and enjoyed myself completely. Besma is extremely friendly and helpful. Don't be put off by the fact that she is a bit evasive about the exact location; she has her reasons, and she will meet you exactly where and when she says she will. There is a good deal of airbnb traffic through her apartment, but the location is reasonably quiet (although earplugs are always a good idea for sleeping anywhere in Istanbul). Accommodations are basic but quite adequate. There was never any traffic problem with the single bathroom. I don't cook, so that wasn't an issue, but Besma is happy to make the kitchen available on request. The central location, near both the Aksaray Metro station and the T1 tram line, is excellent and outside the Sultanamet tourist ghetto, a bit more like real Istanbul.