I stayed for one month in this unit and was very happy with the apartment, facilities, and Jonas's very fast communication when contacted. He is extremely responsive and helpful with any questions or problems. The photos are accurate and the apartment is as described, very nicely designed. The WiFi, appliances (washer/dryer, air conditioning), and other facilities all in good working order.
Things you should know: 1. The neighborhood is a bit noisy with people, kids, and vehicles outside the windows (of course that's not anyone's fault). If you are sensitive to noise or a very light sleeper, you should bring earplugs or plan accordingly. 2. The apartment is halfway on a steep hill in a neighborhood of Istanbul well-known for its steep hills. If you have any mobility problems, this may not be the neighborhood for you.