I stayed 12 days in January at the accommodation in Mert. I was worried about cold weather, but it was rather too warm, so I had to lower the temperature of the heater. The accommodations in Izmir and Antalya that I visited earlier had some problems with heating and hot water, but this place was very good for this point. It's close to Taksim Square, so it's convenient to move around, and Istiklal Street, a shopping street, is also within walking distance. It is convenient as there are Migros and Mart nearby.
There is a small, but specialized kaymak food store 50 meters away from the accommodation in Mert that sells the freshest and most delicious kaymak in Istanbul. We bought kaymak and honey, then bought Migros bread and Ayran, so I could have a convenient and wonderful breakfast every morning. Mert was always gentle and warm and took care of any inconveniences. If I come back to Istanbul, I will come back here again. Thank you. Mert!