The good: Location in a nice part of the city. Fellow female travelers can feel confident walking around in the area alone at night. Flat is large and spacious.
For improvement: I would say the flat is generally overpriced relative to the condition it's actually in. I would describe it as "boho chic" more so than "luxury". Several reviews below mine (including those in Turkish) have mentioned that it "could be more clean", which is a euphemistic way of writing something I hope the host will start taking more seriously, especially with the shower. I wouldn't describe the listing's description as fully accurate - it's not a king-sized bed, and the list of amenities in the bathroom isn't accurate + the toiletries listed seem to be just cobbled together from what other guests have left behind over the years.
To the host's credit, I do appreciate his willingness to have the flat cleaned again when I asked. He also helped me by calling a locksmith when I got locked out of the apartment.