Aren is great and helpful host, but still I felt uncomfortable in the apartment. It was full of Aren's clothes and just a few places to put your own. I guess for 2 people for short term that wouldn't be a problem, but for 4 people for 2 weeks that was a noticeable one. It felt like we moved into the apartment and evicted the owner.
The apartment wasn't perfectly clean, but wasn't very dirty either, something in the middle. Shower facilities needs renovation. Also half of the lights barely working, half of the light bulbs are missing.
Another thing I didn't like is that it is being smoked in the living room. You can feel the smell there every time you close the window. And also neighbours from the floor below smoke in the night by the bedroom's windows. And sometimes I was waking up in the night and bedroom smelled like a bar...
This apartment of course have its pros, but based on my Istanbul experience, considering the price asked and all the cons - I say the value is low and I do not recommend it for stay longer than a few days.