I booked the apartment for a week. The check-in was very successful, and despite the delay in my flight, there was no problem. The brother of Daniel welcomed us warmly and explained everything very well. Before that, I received a helpful mail for tips regarding the arrival. The apartment was spotless and had, in my opinion, the perfect location. It is very central and yet very quiet.
Thank you again for the pleasant stay, and on my next trip to Istanbul, I will book the apartment again. Hence the five out of five stars.