If you want to stay in the best part of Moda then this should be your place to pick. This area is really calm but also in the middle of everything - the cafes/bars, ferry or to the sea, if you miss it like me! A place to feel like a true "Kadikoylu/Modali".
I stayed in Nilufer's place for a week together with my mom and my bf. We also worked from the apartment during our stay, the additional table in one of the rooms was really helpful in that sense. Other than that, Nilufer was super responsive and helpful. We'll definitely come back again.
One thing to note if you never sleep in Kadikoy before and you are a sensitive sleeper like my bf - then you might want to bring ear plugs because seagulls & cats :) Additionally, there were some mosquitos which is normal at this time of the year. Both of these are not relevant with our stay, would have happened anywhere we stayed. Solved by a pharmacy visit.
In short, we loved staying at Nilufer's place, we'd definitely come back.