Don't hesitate to book Abdu's place! He was always available and helpful. The apartment's view was amazing, erything was clean and well-tought! The area is (for me) the best location if you want to visit Istanbul (many stores, supermarkets, restaurants, transport nearby and less crowded than the other side of the Bosphore). The apartment is located on the 3rd floor and from the apartment to go to the main street you have some stairs (quite challenging if you don't have a good condition, my father is 70 years old so it was a little bit though for him). Other than that, I highly recommend Abdu's place!