I highly recommend Ayşen’s place. It is off the beaten path, but this is a very safe location, away from tourist traps, close to public transit. Everything is as described on the listing. The apartment is cozy, spacious, clean, and very comfortable. Ayşen was very communicative and went out of her way to help and checked constantly whether everything was in place, and also offered great recommendations for places nearby. I made a request very late at night and she responded in record time and was very kind to let me check in early in the morning. She also arranged so I could stay a bit past the standard checkout time. Being a bookworm myself, I was especially impressed with her extremely well-curated collection of books, magazines, and Istanbul guides.