I spent 1 week in this place in the heart of Bomonti.
Demir is an amazing host and although the flat is well located and seem to be quite new I did have serious issues with humidity all over the appartment. There are signs of humidity on the walls in the living room and kitchen, and the air does not seem to pure it simply smells like humidity.
Other than that the place has all you need for a long stay. High speed internet , great location and supportive host :)