My wife and I were here for a long term stay - 2 months.
The place has great location: lots of cafes/restaraunts/little shops in the neightbourhood, Bekistas ferry station and Osmanbey metro station are 10 minutes away, Taksim square is 15 mins. Easy to travel from here to most Istanbul sights.
Neightbourhood is quiet and peaceful, with many cats, though my allergies never kicked in.
The apartment itself is on the -1 floor, so there was not much sunshine and was just a little bit wet. But we stayed here in winter and I think in summer it would just be perfect to hide from heat. Soundproof in the apartment is great, we were never bothered.
Oğuzhan was very responsive and helpful host. He even got us slippers and electric extender when we asked for them during check-in.
We had an amazing stay in Istanbul in this airbnb, it really felt like home and had everything we needed for a long stay. Would highly recommend this place.