I've stayed in places in NY, London, Tokyo - but this is the best yet.
Great location, amazing bright flat, photos are old and so the place was even nicer than expected.
Fatih does this full time so he goes to every effort to make sure things are okay, checks in with you, and genuinely cares about your stay.
Yes it can be loud, but that's Istanbul. I'd say this area is way quieter than more touristy streets.
Note it is on the 3rd floor, stairs only. Was fine for me.
Don't hesitate to book it.