It was amazing to stay at Ertan apartment, the location was great, a few minutes walk to Taksim square or Istiklal street.
He sent us a guide for the self check-in, it was very easy to follow the experience was smooth. The apartment was clean overall. However, because it allows smoking, depending on the guests before you, you might smell cigarettes for the first days of your stay.
Ertan was really responsive, he answered us quickly every time. We asked him for an HDMI cable and it was at the door the very next day.