It is not advertised properly how amazing the flat location is! The flat is placed in a quiet side street, behind the famous & beautiful St. Antoine church, which you can see from the big living room window, and is 4 mins up the road to a very busy Istiklal street, where you can go shopping crazy. Check-in was super easy, Mert left us a code to a self check-in box, where he placed the keys.
Between positives of the flat I would say: functional powerful shower, functional strong heating, black curtains in both rooms - not many Airbnb flat owners understand how important this is (!), washing machine & washing powder, comfy sofa and a strong internet connection!
Between negatives: flat is on the 5th floor of tiny, circled staircase, so anyone with 15kg+ luggage, be ready for a strength & resistence workout. However, we did not mind that at all, being a PT :) What I minded though, were stains on the bed linings and mattress, which we made Mert aware of and he sent us a bag of washed ones, together with towels. 1 small towel and 1 big towel per person is just not enough for almost a 2 weeks' long stay. The appartement could have been cleaner, as the shower stinks a bit, carpet has a stain, but the quality of the location and Mert's responsiveness made up for it! Also he has good relations with surrounding hotels and their workers borrowed us a luggage scale! However I would recommend Mert buying one, as well as a dryer rack for dishes. Next time in Istanbul, we would definitely book this place again!