Overall, the stay was disappointing.
Whilst the staff were extremely warm and friendly, the apartment was a good size, well furnished and in a good location, this was vastly outweighed by the negatives.
We had to leave the apartment 2 days before our original departure date. The reason for this is that it was impossible to get any sleep. The 'cafe' below is not my understanding of the definition of the word in my country, but a bar that is open until 4am on a weekend playing loud music. We stayed in the 1st floor apartment and the thin walls and floors made it unbearably noisy even with earplugs. The bedsheets also smelt of damp/smoke.
I feel that the listing is misrepresented. If we would have known the nature of the apartment before, we would not have chosen it. It might suit a group visiting Istanbul for a few days and staying out late partying, but anyone else that wants a quiet night off shouldn't go there.
We actually went back to the bar for a drink one night after we had left. It is a good atmosphere, and Yuri the hotel and bar manager is a warm and friendly guy.