First if all, Mehmet is a really nice, friendly person, easy going and helpful.
Location of the hotel is awesome, 5 minute walk from Blue Mosque, with many cheap bars and shops around (unlike near major tourist attractions).
However, space offered was a bit of a disappointment:
Fist of all, it's not a studio flat, it's a room in a hotel. The address on Airbnb doesn't tell the hotel name and I had to use a local person's help to find the address although I was standing 50 feet from it.
Secondly, I booked 4 nights and had to change room twice due to broken toilet in the first room and another guest's booking in the second room.
Thirdly, there was some fungus on bathroom ceilings (didn't bother me but if someone's allergic...) and small fridge in the room was unplugged with someone's medications left in it - clearly not checked before I arrived.
The beds were cosy in all the rooms, sheets were clean and fresh towels provided daily. Staff was kind and helpful.
The place has a potential it just needs some love and care.