The apartment was good overall, great localisation, nothing missing and really well placed in the city, close to pretty much all the main things you can do in Istanbul.
But few disappointing things : first we found few (around 5 to 8) cockroaches in the apartment, we know this is pretty common in this kind of country but still. Second the neighbourhoud was noisy and the apartment not really soundproof (we did not had much luck as there was massive building works right next to us), and the main building door was really noisy each time someone came in.
Still good experience and I would recommend it to people just wanting a place to sleep.