Well, we saw the host only once (or twice). He was very kind to bring us dinner since we arrived later than expected due to flight cancellation.
The apartment had known better times: it is kinda beaten up but feels authentic from my long experience of living in Istanbul. The bathroom is nothing to say of.
No TV may be an advantage for some, no lift to the 4th floor is only a one-time nuisance, but the lack of AC could be a problem if you visit in summer. Not in my case though.
There was a distinct smell of mold after the rain.
The balcony/terrace, the neighborhood and the view beats it all though. There's a metro station 10 minutes away. We had a car but used public transport sometimes since it proved more convinient
Overall it was a nice experience and we liked the district: very quiet and peaceful. A mosque nearby and a school next door only added to the experience.
I'd say it's a nice place for a short stay in midseason.