We stayed at Cihan's place for 10 days, and were extremely satisfied with our choice. The view of the Bosphorus is truly amazing especially during the day. We always had food in the balcony, and were surprised with the amount of privacy we had - no other apartment overlooks the flat (top two floors of the apartment next to us were empty).
Apart from that, I should note that we stayed here during the pandemic days. We had no trouble with any hygiene-related issues, and the apartment felt safe during our stay. In addition to this, the closest market is only 2 minutes away from the apartment, and there are many places to go shopping near Cihangir region. If you don't want to go shopping, you can use the app "Getir" which delivers to your doorstep whatever you need in 10 minutes. Or, if you don't want to cook, there are exceptional restaurants that make deliveries around this region. We occasionaly had pizza, seafood or burger nights. Even Zula (by far the best burger joint in Istanbul) delivers.
Overall, the flat is highly recommended. No need to look further if you want to enjoy a nice stay with a Bosphorus view. Just a slight note, there is a construction site nearby which causes some noise very rarely. However, this was no problem for us.
Many thanks to our hosts Cihan and Ozge for being very responsive and attentive.