The owner is very friendly and was ready to help with any problems. The apartment is well located very close to the transport center of the city - Taksim Square. There are many cafes and shops nearby.
Disadvantages are the noise in the evenings from a nearby nightclub, excellent audibility from a neighboring apartment (which the owner warns about in advance) and very unstable Wi-Fi.
In general, we enjoyed our staying at this apartment. Thanks to Erol !