Mum and I stayed for 3 weeks. We experienced issues in terms of cleanliness and with the amenities namely: bed bugs, malfunctioning washing machine, broken shower head, stained sofa, towels and bed sheets, black mold in the bathroom, etc.
The host responded quickly to all of this, but rarely in person. He sent us the cleaning lady, an electrician, and even a mechanic. Unfortunately, this very delegation of tasks lead to severe quality issues.
The exterminator / pest control had us wait outside the Airbnb for hours, only for bed bugs to return. And the mechanic had us wait on three different days, before the washer was actually fixed. The electrician found - hidden behind the TV sideboard - an old, cut in half cable, that was dangling into the wall socket, hence causing the short-circuit.
If the host actually checked his Airbnb before letting guests in, I'm sure he could've spared us some of these troubles.
We won't stay here again, and depending on the host's ability to get his act together, I won't necessarily recommend it to others either. But it's still one of the better Airbnb's in Istanbul at its price-range, and location. There's potential here, and without the issues mentioned (esp. bed bugs), it would've been a great stay. I just hope you'll be luckier than we were here.